Citation needed.
I'd actually be quite satisfied if the current state of the art for general-purpose web IR stayed about where it is now- it's pretty dang good! I can't remember the last time I needed to find something using text search and was unable to. And when Google folks talk about making search "better", what they seem to generally be talking about these days is making it more "personalized", which strikes me as a questionable goal in terms of costs and benefits. Cost: living in an electronic panopticon the likes of which Orwell could never have envisioned, having my private information used as a raw material for somebody else's monetization strategy, etc. etc. Benefit: marginally better IR?
Note that I'm not writing this as some sort of technophobic Luddite- I'm actually an academic researcher who works on IR problems. I guess it's just that I, as a potential end user, don't see enough value in hyper-personalized search to be worth the inevitable tradeoffs in terms of privacy and information centralization.
Plus, I'm absolutely not anti-Google, or full of conspiracy theories, or anything like that- but I still find it more than a little creepy to think about just how much information they have about me. Just sayin', is all.