You'll need to own a 4K-capable device to watch, of course. Besides the Chromecast Ultra, Google is pointing to newer Sony TVs and the Xiaomi Mi Box 3 as examples of hardware that can handle Google Play's higher-resolution catalog. This isn't an exclusive list, of course, and Google is quick to add that 4K titles will come to other countries in the future.

Google certainly isn't the first major video provider with 4K movies -- Netflix, Vudu and Hulu have beaten it to the punch. However, this is a big deal if you thrive in the Google ecosystem. You now have a go-to place for premium 4K video right from the get-go, without having to turn to third-party services.