At launch, Google’s new subscription service YouTube Red competes most directly with premium music streaming services, also offering ad-free videos

YouTube’s augmented revenue model re-boots incentives for native talent to produce content for the platform, and will also widen its appeal for established content producers

Although consumers are likely to find paid subscription for ad-free videos a weak proposition, Red holds much potential for YouTube as it competes for attention across device ecosystems, and presents little risk to its existing advertising model

Despite dropping the Fire Phone, Amazon has upped the ante in its battle for digital media consumers, upgrading its Fire TV devices and rolling out a new range of low price and robust tablets, starting from £50/$50, squarely aimed at the mass market

As with all Amazon devices aside from the failed phone, they are conduits for the company’s media and retail services, aimed at increasing purchases and forcing other platform operators to include them

Although shrinking as a share of Amazon’s business, media remains crucial, both for direct revenue and to attract customers to Prime, its membership programme, which by some estimates now accounts for the majority of its US sales

Consumer ebook sales exploded after Amazon launched its Kindle in the UK in 2010, but growth rapidly slowed, and disruption was limited by genre, creating parallel ebook and physical book markets

Compared to the relentless downward spiral of music purchasing, these trends have been heartening for publishers and booksellers, but there are signs that slower, more complicated and insidious disruption is emerging

Decades of steady, albeit slow, growth in total book sales have been reversed, as consumers spend more time on a variety of mobile-delivered services, including some in classic content categories for books

The latest numbers for Q1 2015 show strong device and internet user growth, with more of the population online than ever before, including more than 90% of under-55s. Growth amongst older groups, however, has slowed to a crawl

Participation in online activities is up across the board, but digital media data shows spend on ebooks and digital music struggling, with the latter being heavily impacted by the rise of unlimited streaming models such as Spotify

The story of mobile's surge continues, with almost a half of e-commerce transactions and a third of search and display ad spend now going to mobile. Most of these mobile devices are Android, but iPhone seems to have gained long term share with its larger phones. Google services, however, have cross-platform reach

The Game Developers Conference (GDC) and Mobile World Congress (MWC) saw major announcements in virtual reality and new generation streaming game consoles, as well as further opening up of access to game engine software

Latest earnings reports show that major publishers and developers are currently in buoyant form as growth in the PlayStation 4 and Xbox One install base boosts revenue and consumers migrate to digital sales

Results for developers dependent on the mobile or online ecosystem are more mixed: King (producer of Candy Crush) continues to grow, but Zynga is struggling, although recent performance hints at a possible halt in its decline

Amazon, Nokia and Apple are expected to announce new mobile devices in the next fortnight. We outline the main products and features expected and their implications

Around 125m smartphones were sold globally in Q2, up over 30% from Q2 2011. Around 450m mobile handsets were sold in the quarter, giving smartphones a volume share of around 28% Apple and Android dominate with a combined of 85% of units sold, and a cumulative total of 810m devices running their mobile platforms. Of these we estimate that 680m are active, of which 95m are tablets Android arrived later and has grown faster, but Apple’s market share of smartphones as been steady at 20-25% for several years: Android’s growth has come at the expense of Nokia, RIM and feature phones

Search remains the main engine for Google’s core business, but display is rising fast: we estimate display gross revenue will reach $9.2 billion in 2013, representing 16% of projected gross revenue (excluding Motorola)

Gross revenue from YouTube looks set to more than double to nearly $4 billion by 2013. Revenues from Google’s ad networks and platforms are also growing strongly, mainly to the benefit of publishers

We project Google’s net revenue from display next year will amount to $4.2 billion, equal to 10% of net revenue from its total advertising business

Apple sold 67m iPads through March 2012, and retains over 70% market share for premium tablets. Apple is aiming for the same long term dominance it enjoyed with the iPod, which maintained similar market share for a decade Microsoft and Google are taking radical steps to try to change this. Both are now making and selling their own hardware, while Google will sell a tablet at cost Microsoft and Google now have coherent tablet propositions, but they remain far behind on broader app ecosystems. Like Nokia, they are now back in the game, but they still have to play

Google+, the social network, has around 100 million users worldwide, although user growth appears to have stalled and usage is low on weak network effects

Facebook users, now 70% of the adult internet audience (excluding China), have no incentive to switch to Google+, starving the social network of vital momentum

Facebook is likely to dominate socially enhanced search, unless Google+ takes off, which seems unlikely