First off, we are talking about early development or beta version of all three browsers, and when the final product is out, things may change.
Now, here is the deal.
Sebastian Anthony of Downloadsquad took all three browsers, their latest beta or dev versions with hardware acceleration enabled, for a spin  and he has a good news for Chrome users. Chrome 7 seems to be performing better than Firefox 4 and IE9. This however comes at a cost, a high amount of resource usage compared to the rest.
From my personal experience with Chrome 7 with hardware acceleration enabled, things are brighter 
If you are a big fan of farmiville and other graphics intensive online games, wait for the big day, the release of this feature to the stable version ! Or if you want to try it now, you go here !