Being able to play PC-ish games without Windows (all on its own) makes this pretty interesting. Looking forward to seeing its real world performance. The fact that it doesn't take up the space of a household appliance is a plus too.
What exactly do you mean by "pc-ish"? Setting aside steam deck, are you aware that you can already install steam on linux and play many games [0]? Are you aware of Bazzite [1]?
0 - https://www.protondb.com/
1 - https://en.wikipedia.org/wiki/Bazzite_(operating_system)
Long time veteran Linux user. I was not able to get anything to run on Steam. It's some sort of display driver issue/conflict, but if it takes me longer than an hour, I'm over it.