I think you're missing the point. You use something like this to help in design/testing of accessible spaces. An exosuit can't cut you half to help you make better children's spaces.

My initial thoughts too.

Amen.

Use it to make yourself stronger, break free like the running man in Animatrix

When you stop walking, that's the beginning of the end.

Beyond the obvious (medical care, accessibility, etc), I think technology has a huge amount of untapped potential to make the end of our lives a lot more bearable, and a lot less lonely. TV is one thing - and whether it's a net good or not has been discussed to death, so I won't here - but I wonder how video games might be used. They're a lot more engaging - both generally and cognitively - than TV, you can build and achieve things and feel a sense of accomplishment (yeah yeah pride and accomplishment), there are communities around them, you can play with your family, etc. Even online board and card games would be an option. Have you ever considered showing your dad some simple games?