Honestly I hate to say it but I think the Switch was actually the big advance. It does not run PC games but it does run a fairly standard OS ( I believe a flavor of android ) and the old Nvidia processor from the Shield.

I guess what I am saying is it is sort of like the Steam Deck but based on a tablet instead - and can pretty easily be hacked into a tablet instead. The Steam Deck is much more locked down but they MUST have been hugely inspired by the success of the Switch when making the Steam Deck.

Personally I think I am excited for when we might get something a bit more of a hybrid of the two - if ARM does indeed take off on Windows and Linux more then we may end up with a device that can sometimes take a full ARM stack with all of its power advantages and then also run standard older OS processes as well.