I was reading an article on the semantic web a few days ago. Companies like Radar Networks are already building products including search. It will be interesting indeed.
I think it's because the technology is maxed out. Or rather, every angle(link analysis etc.) to do search given the current state of the web today has already been developed. That and Google has been patenting whatever little(if any) is left. Maybe search with social features will pan out?
[edited by: kemikal at 1:28 pm (utc) on July 12, 2007]