I'll keep an eye on it and see how it develops.
I'm not fond of metacritic when it's used as a metric for bonus payments to companies, but as a tool for judging games I'm not sure about it can be somewhat useful.
If I'm unsure about a game, heading there, seeing the average scores, then scanning the user reviews is something I'd do.
Granted, I'll usually then head to forums discussing the game too, but for a glance it's useful enough to be worth checking.
It's possible that OpenCritic may be able to develop itself into a similar tool aswell.