Amazon now sells more ebooks than print books on Amazon.com, while overall US ebook sales were 15.6% of the consumer market in March, up 142% from last year. Meanwhile, for some publishers over half of book sales are now through companies that are not book sellers

Waterstone’s has been bought by a Russian investor for £53m, with James Daunt parachuted in to take it back to its roots in bookselling, while in the USA John Malone has bid for Barnes & Noble valuing it at $1.45bn

As book buying moves away from bookshops and away from print, both retailers and publishers will need to rethink both their scale and the way that they engage with readers. Beautiful shops and beautiful apps are probably an insufficient response

In the March 2011 quarter Apple’s revenue was up 83% year-on-year and net income up 95%. iPhone sales are up 113% and the iPad has sold 19.5m units in the last 12 months. Even the ‘legacy’ Mac business grew 32%, and Apple now has over $65bn cash in the bank. Not bad for a niche business

With single digit penetration in its core growth businesses, Apple has the opportunity to continue growing fast for some time to come

The threat from Google’s Android is real but limited: we expect Android to take a large part of the mid range phone market but that Apple will retain and extend its competitive advantage for tablets and high end phones

Facebook's audience and consumption growth is now generating substantial and rising display advertising revenue, with consensus estimates of $2 billion in 2010, up 160% YoY, and it will overtake Google on this count this year

The social network's growing position as the centre of the internet experience is enabling it to become a platform for other services, such as e-commerce, making it an increasing strategic threat to Google, as well as other players in the digital media

More importantly, like Google before it, Facebook’s scale and function has the power to disrupt the digital e-commerce and marketing models built over the past decade

In Q1, Google’s UK gross revenue increased 13% YoY to £602 million (net of hedging gains), down from the 18% growth in the last quarter and in Q1 2010

Slowing growth appears to be due to the weak state of the UK economy, with consumers and advertisers alike holding back on online spending compared to previous years

We have downgraded our 2011 UK growth forecasts for Google and internet advertising spend to 12% and 9% YOY respectively; while search remains the main market driver, online display is increasingly the key battleground

Market data and industry anecdote point to an explosion in ebook sales in the US and UK in 2011. Leading consumer publishers are seeing ebook sales at 10-15% of total sales in January and February, driven by Christmas device sales

So far ebooks had been strongest in niches: romance, business books and frequent travellers. They have now moved into the mass market: few genres will be untouched

This shift brings with it a very different market structure, with Waterstones likely to shrink dramatically, technology companies with little stake in the health of publishing taking major roles and publishers faced with disintermediation and forced to build direct consumer relationships for the first time in their history

UK internet ad spend rose 13% YoY in 2010 to £4.1 billion; stripping out newly included formats such as mobile and Google hedging gains indicates actual growth was 15%

Growth in display, increasingly powered by Facebook and Google, continued to outpace that of search, with early signs that some brand advertising is shifting online

We have revised our growth forecast for 2011 to 10%, taking spend including mobile to £4,400 million, pushing the internet’s share of total advertising to 27%

European mobile revenue growth improved very slightly in Q4 2010, up by 0.1ppt in reported and 0.2ppts in underlying terms, but remained negative

While the improvement is welcome, growth remains very subdued compared to pre-recession levels, especially in Italy and Spain, which continue to lag the growth of the UK, Germany and France

The outlook for mobile revenue growth is bleak, with severe MTR cuts in Germany and the UK likely to drive growth down again over the next six months

Last week Apple introduced a new subscription payment system for publishers using its devices, but also clamped down on publishers using their own payment systems, obliging them to offer Apple’s system (with a 30% commission) in parallel or leave the platform

For publishers selling their own content with no marginal cost, this is an extra cost that most will grudgingly accept. But aggregators obliged to pay rights-holders a fixed fee for each content sale, such as music or ebook vendors, face bigger problems: some will be forced off the platform

Apple is trying to strengthen its ecosystem, increasing the range and user-friendliness of apps and locking users in with content only usable on its devices. Yet it risks pushing some popular services off its platform entirely, increasing the appeal of the newly launched Android devices

With the Daily, Rupert Murdoch has launched an iPad-only mass market ‘newspaper’ with a fifth of the journalists and just 15% of the revenue per reader of a conventional popular newspaper. Whether it succeeds or not, this sort of radicalism may be essential if the spirit of newspapers is to survive

The Daily is using every tool Apple and the social web can give it to drive adoption, but for all the video and twitter feeds it remains at heart a print product on a tablet. The first truly native iPad news voice has yet to come

The Daily and its peers are discovering that a platform owner such as Apple has power the print unions never dreamed of, with the payment models they want conflicting with bigger strategic objectives at technology companies ten times their size

Google’s UK gross revenue rose 18% YoY in Q4 to £550 million (excluding estimated hedging gains), with bad weather and the impending VAT rise helping to deliver better than expected performance

The company’s core search business continues to be a key driver and beneficiary of the growth in consumer e-commerce, which we project will increase by 20% in 2011, compared to 4-5% for retail sales (excluding fuels)

We have raised our 2011 growth forecast for Google’s UK business to 15% – with search supported by growth in mobile and display – we now project UK internet advertising spend will increase 11% this year