Well, I'd like to offer a caveat to that. While I don't think we ever need Satoshi to step forward in real life and identify himself, there is still the possibility that he or an inheritor will someday want to utilize the ~1 million coin fortune that he holds - perhaps for a philanthropic project or for investment in a worthwhile business startup, for example. As the Wright episode has shown, even the slightest rumor of a "Satoshi sighting" can move the market without proof - now imagine how the market might react if the coins really did start moving?

It would be prudent and courteous (to put it very mildly), therefore, for Satoshi to give everyone a heads up prior to taking any action. Not a press conference or anything. Just a post here or in a similar public forum with appropriate proof (similar to Charles Lee's litecoin demonstration) to prove the authenticity of the post, outlining briefly his plans to move/spend some or all the coins, with some idea of the timeframe involved and method of transaction (an auction would make much better sense than crashing the markets).

Again, Satoshi wouldn't need to reveal his real world identity. Just authenticate a message and let people know what (in general terms) what he plans to use the bitcoin for, and that he's not abandoning it or signaling that Bitcoin has failed.