Personally, I'm interested in his life beyond Apple. He was an out-of-the-box thinker who went through many serious failures and successes. How could he NOT be interesting? I feel I could learn a lot from him. I certainly learned a lot from his now-classic Stanford(?) speech.
We all really do hope for the best for his health, but we all have this unspoken belief that his days are very numbered.
I suspect that like me, many others feel the need to thank him for what he's accomplished, and reviewing and celebrating his life is the next best thing to shaking his hand.