Considering how game reviews consistently label games as brilliant when those games are just more of the same, I think more critical reviews like Yahtzee's are one of the things the games industry needs to improve the rate of innovation.
Take Bioware, for example. Why would they strive to improve their design formulas, if every single game they release is met with almost universal praise? Game journalists should be more critical, both in reviews and in previews. I mean, even NWN1's OC got fantastic praise at the time of release.