Greger, if you can still STAND and walk a few steps, please do so at every opportunity. The wheelchair is a valuable tool but as Karen says, it does not need to be a final destination.
So if you still have control over your leg muscles, use them as much as possible even if you can't walk more than a few feet, still USE those legs in any way possible, whatever way possible.

"The Best of the Leon Russell Festivals" DVD