Here's my thoughts.
Chrome is VERY similar to firefox so the transition from firefox to chrome will be VERY negligible. So now if they can get all the proper addons and small things fixed in Chrome I could see it becoming fairly popular due to its small footprint memory wise and disk space wise.
Oh and themes for Chrome won't be hard; the UI is contained in a single DLL file and if I felt obligated I may do it.. but I don't hahah.
Themes already:
->
[theme] Google Chrome - "PitchBlack" - WinMatrix