The latest project by Stephen Wolfram is defined as the first "computational knowledge engine", something capable of answering factual question for you.
The Wolfram engine is described as "a proprietary system based on fields of knowledge, containing terabytes of curated data and millions of lines of algorithms to represent real-world knowledge as we know it".
Two days ago Stephen Wolfram gave an early preview of his "computational knowledge engine" Wolfram Alpha at a talk at Harvard University.
The video of the whole presentation (1h 45min long) is here above, while down below you can find some highlights I transcripted from his speech.