I already am, and have switched my quick start bar shortcut to the x64 version.
I rarely use the back/forward arrows, use back space and the alt+ arrow keys mainly. One thing that was annoying is/was the short address bar, but i figued out you could expand it.
I use a 19" widescreen laptop, so space isn't at a premium, and my desktops dual screens, but it does look like alot more screen.
Do the settings, notifications and such show up on the far right side of your browser window too?