I think we're all forgetting that the prime reason Wolfram has a blog IS to expound on his ideas, and showcase the versatile uses of his Mathematica software, in the same way Google, Microsoft or ordinary developers have their own blogs.

But for some reason, people expect his posts to be general commentaries about science, math or computing, like a Scientific American Blog post - perhaps it's due to his reputation as a 'genius', which makes people forget he is also a CEO.