With a good internet connection. And a controller.
The pitch of game streaming is play anywhere. The reality is play in your home, just like you would on a console, but a bit shittier.
Certainly it could find some audience if it’s handled better than Stadia was. I don’t seeing it being a big audience until either the gaming market or the internet situation of most of the world changes beyond recognition. Absent just bundling it into something that is already a crazy good deal like Game Pass, of course.