They already have locked down special purpose gaming machines. They're called gaming consoles.
Really, if keyboards and mice were more accepted components of those that developers always accounted for, I would just buy a console for gaming (except all my old games, but really, that wouldn't be hard to handle on a console either).
It's already a little concerning to me that I play games on my main PC for the same reasons you most likely are worried about it. As it is, I try to keep it to things on Steam and the occasional old dosbox game from GOG, so at least I don't have to be hyper aware of all the different individual launcher capabilities.
Really, if keyboards and mice were more accepted components of those that developers always accounted for, I would just buy a console for gaming (except all my old games, but really, that wouldn't be hard to handle on a console either).
It's already a little concerning to me that I play games on my main PC for the same reasons you most likely are worried about it. As it is, I try to keep it to things on Steam and the occasional old dosbox game from GOG, so at least I don't have to be hyper aware of all the different individual launcher capabilities.