Turns online gaming is a great hobby for retirees with mobility issues. Join a guild/clan with a raid or play schedule and it’s like being on a sports team, but without the physical demands.
Discussion
Well, for my dad, it's cognitive issues too. He needs a system with no password, where he can just get in there and play, and possibly with some sort of algorithm that calibrates itself to his response time- slow it down enough so he can play, but not enough so that it's too easy and boring. If it could keep him just at the edge of his current capacity, perhaps he'd get better or at least not decline anymore.