Honestly, I don't think much will happen if Satoshi decides to reveal his identity tomorrow. I mean, the project is already in the hands of the community. It has been doing fine without Satoshi. Personally, I wouldn't freak out. But I know others will. Especially newbies. What concerns most people is Satoshi's ability to sell his Bitcoin and crash the market. But this would only happen if he decides to sell all of his coins through an exchange. If he does an OTC trade, Bitcoin's price won't be affected.

I think we're past the point of knowing who Satoshi is or ever was. Unless the person claiming to be Bitcoin's creator proves possesion of early-mined coins with the original private keys, Satoshi's identity would be a wild guess. There are far more important things to focus on. Don't you think?