Personally, I would really like to see Valve add a video capture feature. Like how on Xbox and PlayStation, you can press a button to record the last 30 seconds of gameplay. Something like this is almost impossible to do conviently on Steam Deck and just Linux systems in general. Valve adding it in natively to the Steam UI would be absolutely amazing.
Anyway, what features or improvements would you like to see on Steam Deck?
There’s a few programs out there that do that already but it would be nice to see it built in and polished.
https://www.gamingonlinux.com/2020/07/replaysorcery-is-an-open-source-instant-replay-solution-for-linux/
The downside to that is that for it to work, it has to be constantly recording so that it has a 30 second buffer of video. This works fine on Xbox and Playstation, but on Steam Deck that would be a constant drain on the battery.
That’s not to say that it would necessarily be on all the time. There could be a switch to only enable it when it’s plugged in, for example.