Recently, we reported that 4K films had started appearing on Google Play, Google's film, TV and games store for Android devices. Now Google has made it official.
It announced the news in a blog post. The bad news? They're only available in the US and Canada to begin with.
In those regions, Google Play offers more than 125 films in 4K (aka Ultra High Definition, or UHD). These include 'Star Trek Beyond', 'Batman vs Superman', 'Mission Impossible: Rogue Nation' and 'The Secret Life of Pets'.
They're only available for purchase right now, not rental. Prices start at around $7.99 (£6.33) and go up to $29.99 (£23.77).
Viewers can buy the films on their Android device or the web, then stream them to their Google Chromecast Ultra streaming device, their Sony Bravia Android TV, or their Xiaomi Mi Box 3. Viewers who've just bought a Chromecast Ultra – Google's streaming dongle that streams in 4K – can get their first 4K film for free, though only on select titles. These include 'Ghostbusters' and 'Captain Phillips'.
4K is a resolution that's four times as sharp as Full High Definition. Sky and BT offer some content in 4K, as does YouTube, but terrestrial broadcasters are yet to get on board.