I have yet to see any technology that will change a bedpan in the next 30 years. Much less provide the most important component to an older person’s mental (and hence in some ways physical) health - which is the company of other humans, family and friends, and typically grand children and other decendants.

I have been thinking of some powered exoskeleton that provides mobility as one solution.

What is more concerning is loneliness, but maybe VR NPCs or something.

I don't think loneliness will be massive issue. Considering the population of young adults and adults already suffering from it. Nothing will be different for us. And the communications are likely to improve so this is one thing that technology can solve.

In that case, if these technologies become so successful to eliminate the need for young people, they will basically become our successor species and all this is moot anyways.

Obviously that won’t happen overnight, but it could definitely happen gradually.