It performs better than a steam deck. I repasted with PTM 7950 and it seems to be ok thermally.
The display is atrocious for gaming though, the ghosting is really bad.
Lately I've been using an egpu (GPD G1) with glasses (Xreal Air) and quite like that setup
Light gaming is... fine. I think if you're playing an fps (or anything with lots of motion) it's noticeably bad.
Those panels you linked are all 60hz I believe, but they may? have less ghosting but IMO may not be worth the effort unless they have 120hz or are oled
I think the hardest part of finding a panel is to find one in the uncommon 3:2 aspect ratio the framework uses
I remember some people were looking at alternative panels but they're usually for replacement and not upgrade, and I don't recall a high refresh alternative being used successfully (yet)