Remote work will probably only expand, and I should be able to handle that well into my 70s and 80s if I make it that far. Medical issues caused by chronic computer use probably won't be that bad compared to laborers a few generations ago (and if we're lucky, I'll just plug something into my brain 10-20 years from now or replace my arms with some Deus Ex stuff). There's going to be some new tech to learn. They'll need people to know that tech.
I got a decent chunk of cash and got lazy about getting a job because tech is still in such high demand and I can fall back if I have to, and to be honest, having nothing to do feels exactly what I imagine retirement to be, and it's fucking boring.
The only way this changes is if I get hit with a mental disease like Alzheimer's or get in a paralyzing accident. Then I'm getting an exit bag for myself. Or someone starts a nuke war.
It feels difficult to envision retirement to me because I can't even imagine technology 5 years from now. We're advancing rapidly and our rate of advancement is only increasing. This includes healthcare technology (although I imagine Epic and Allscripts will still be around).