Great overview of the new Retina display on the MacBook Pro by Anand Lai Shimpi. Of note:
Here Google appears to be using their own text rendering to an offscreen canvas, bypassing Apple’s default text rendering/scaling APIs. Chrome’s offscreen render doesn’t appear to be Retina Display aware, and thus you get the mess you see above. It’s usable, but it’s a significant enough difference for me to drop Chrome and use Safari until it gets worked out. And I really like Chrome.
I’m in the exact same boat. Other apps like Twitter for Mac and Sparrow need to update ASAP as well, they’re basically unusable with that awful text rendering.