Want to know how to watch movies in 4k/HDR with Google Play? There are certain devices and requirements that need to be met. And, Google recommends at least 15Mbps internet speed for viewing 4k movies which require more bandwidth than SD or HD movies. HDR support depends on the device, TV or display viewing on (see the second list of supporting devices below). And remember, not all 4k titles contain HDR specifications. To find out what movies and shows are available see this list of 4k/HDR titles on Google Play.
Google Play 4k Supporting Devices
4K Android TV models including Sony Bravia, Nvidia Shield and others
2017 or later Samsung 4K Smart TVs
2016 or later LG Smart TVs
Chromecast Ultra when connected to a 4K TV
Google Play HDR Supporting Devices
2017 or later Samsung 4K Smart TVs
2016 or later LG Smart TVs
2016 or later Sony 4K Bravia Android TVs
Chromecast Ultra when connected to compatible TVs.