Now try it on your phone. Playing Diablo 2 Remastered in bed on an android phone with controller attachment on 6.7" OLED 2340x1080 @ 120hz HDR is super amazing. Better than Steam Deck....phone stays cool and battery lasts forever, it's the same as watching a movie on it.
I'm sure that works fine, but playing on an 8 inch 16:10 screen (like the Legion Go S or the MSI) has to be a better experience than a significantly smaller 6.7 inch screen. Despite the obviously higher quality HDR on your phone.
Every time I've tried PC gaming on undersized screens, every single inch makes a big difference to the immersiveness and reduced eye-fatigue. It just ends up being something I have to put down early because of that. 8 inch is the smallest I can go where the compromise makes sense.