Only initial thoughts are why in their right mind are they using windows on a handheld device
Windows because it will cost Framework or whoever it is a lot to do it Valve style - coming out with your own distro, support it and yeah the proton issue. If it will run only Linux games, that market will be minuscule.
It's a third party person doing it so they're planning on doing a DIY kit soon. I checked and seems like you would just install linux like you would on any other framework laptop so I'm actually pretty excited!
So I don't game a lot and I'm not sure what that car driving game is, but I noticed at ~1:30 his left thumb is moving all over the place and the car keeps driving in a straight line? It doesn't seem like any of his hand/finger movements match what's on the screen, am I crazy?
It looks like the rally game Dirt and can confirm that keeping the Ford Sierra Cosworth in a straight line can be a challenge!
how is that modular? it's all one piece except for the controller. congratulations, you have a console.