Yup, and when that time comes, I will take care of it.
However, don't discount "Moore's Law" for computational aids and bioengineering for locomotion aids.
IMHO, Growing old in 2025 years will be far different that 2005. I predict (and yes most predictions have fallen far SHORT of the mark) that by the time I am 75, hips, knees (possibly entire limbs and spine) etc. will be fully functional artificial constructs. We well on our way in that regard already.
Must be getting old!!! hehehe
Come on baby, do the locomotion...