[mijamo]

Netflix in 1080p is nowhere near the quality required to play games in 1080p. It is heavily compressed, whereas games need crisp precision because it contains a lot of text that should be rendered precisely, as well as having pixel perfection for a lot of in game elements. To convince yourself look at Twitch, which has higher bitrate than Netflix for a similar resolution, and realize than even that is far from good enough to be playable.

[fomine3]

Also video encoding must be done in strictly realtime for gaming. Twitch also prefers realtime for communication but not so strict. Netflix pre-encode their videos so they have significan quality advantage even in same bitrate. So Stadia needs more bitrate than Netflix for same quality.