Savvy users may still avoid IE8 because of the mono-culture infection risk, but I think the only thing keeping people off of Chrome is the lack of a plug-in framework.
(Of course there's more social reasons like Safari for Windows lagging, my guess is that it's too "Mac-based" with the custom windowing and font-aliasing.)
I'm a Firefox loyalist at the moment, and will stick with it until 3.5. At that point, if it fails to impress I may have to fall back on something else but as a Linux user, my options for Firefox rivals are limited.
The thing that pushed me over the edge was the "compatibility" button in IE8, that a user is expected to push when their favorite website won't load. After struggling to view some google sites I frequent, the insanity of it struck me.
Then there is the equally insane meta tag, that I now need to put on my site, to ensure IE8 users view my pages in IE7. IE8 seems to struggle with complex Javascript sites.
And lastly, then I looked up benchmarks for Browsers. IE8 is far behind the Firefox. IE8 is supposedly 35% faster then IE7, but that is little incentive to stay with it, considefing Firefox is something like 5X faster.
It was easier to download and give chrome a try than to try and figure out how to fix FF3.