Too old to continue traveling ? Grown children urging ..

I told my kids that I will gladly hand over the keys on a couple of conditions.

A. I am no longer converting O to CO2
B. I can't tell plastic keys, from real ones.
C. I forget their names.

Seriously it is a discussion that needs to be made. The DW and I are still young and not on the road full time yet, but the kids have a list of things to measure my ability to stay on the road. I have been promised plastic keys and a ride in a wallmart buggy when I can no longer function unsupervised.