Chrome now has hardware acceleration, brings phenomenally faster fishes
Early testing suggests that performance is still worse than Internet Explorer 9, but the gap has definitely been closed a bit. The '1000 fish test' now clocks in at about 10 frames per second, which is definitely an improvement from last time -- but still some way short of IE9's 45 FPS.
The Chromium blog post says that only some content is being accelerated, so the Fish Tank might not be a fair comparison of the browsers. I'll try to find a better test or benchmark and share my findings later today. You can enable hardware acceleration in Chrome with the --enable-accelerated-compositing flag -- and if you discover anything interesting, please share your findings in the comments!
Update: you might need a nightly build of Chromium to take advantage of this hardware acceleration. It would be nice if Google could explicitly state when the changes were made...