Not saying this will be it, but it's the future of search engines in one way or the other. A search engine that actually delivers information and can assemble information together, not just a list of results it found. Google is just a giant index. At some point we will look back on that and laugh how we fooled it by buying a few links.
BTW, for those that don't know, the founder, Stephen Wolfram is not just some joker with some venture capital. He's a mathematical genius with very few peers and specializes in exactly this type of work.
http://en.wikipedia.org/wiki/Stephen_Wolfram