Stratton said that Doom Eternal both plays and looks "great" on Stadia. The sequel to 2016's Doom will play in true 4K HDR at 60 FPS on the cloud gaming platform. Stadia itself is designed to unite players, spectators, and developers all on one platform. For example, during Google's keynote, the company showcased how you will be able to watch a trailer for a game on YouTube and then start playing said game through streaming within a few seconds.
Stadia will be supported across several platforms, including desktops, laptops, TVs, tablets, and phones. At launch, the service will be able to stream games up to 4K HDR at 60 FPS with surround sound, and Google has scheduled plans to increase that to 8K resolution in the future. Although you can use existing controllers with Stadia, Google is also releasing its own controller--which supports Google Assistant. Stadia scheduled to release sometime this year.
For more information on cloud gaming, you can read up on how it works as well as which companies other than Google are investing in the technology behind it. We're collecting all the Google gaming news announced at GDC today as well.
Doom Eternal is also loosely scheduled for 2019, coming to Xbox One, PS4, PC, Nintendo Switch, and now Stadia. Neither Bethesda or id Software has announced whether the game is coming to the Switch the same day as the other platforms, or if that version will be delayed. Eternal is more immersive and gruesome than its predecessor. The new game also offers additional means of moving around the map--including a grappling hook and free running.