It would not behoove the real Satoshi to out himself at this point. It would undoubtedly lead to an deflation in value of Bitcoin for the real Satoshi to be known. As long as it is a mystery, Bitcoin's value will continue to climb long term. My suspicion is that Satoshi was a government employee, and possibly a high-level one, at the time he created Bitcoin. He may still be employed by the government, which is another reason he wouldn't want his identity known. We likely won't know who it is until it won't matter any more.