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