It kidna sucks having accomplished so much very early in life and then being "now what?" It's like he was never able to relive that glory of Apple, not that he necessarily wanted to. But it's like, 'what do you do to fill the time?'
If you have kids, go be with them. Travel, see the world.
Philanthropy.
Start another business if you feel the urge. Meet people. Get into the arts (the founder of my present company, OVH, used his fortune to buy a bunch of guitars and become a performing musician, Ken Block used his DC money to get into car racing)...
A creative soul like Woz will always find something worth doing :)
Edit: no longer gray by the time I typed this.
This idea that we have to keep "accomplishing" things for life to have meaning is unhealthy.
For every Beyonce, there is an equally talented person who wasn't at the right place at the right time.