This too is my concern. The guy is brilliant, but I really feel technology like this can only reach its full potential by being open and extendible by domain experts. Hopefully Wolfram realizes this as well -- it sounds like he has put forth significant effort and money bootstrapping the engine with knowledge and so on, hopefully he passes the torch to the rest of the world and doesn't propose his company be the only source of information into this engine.

If he provides not just technology and data but also the means to extend that technology and data by following his example he might be contributing something truly revolutionary.