For me it's the password manager. I still have Firefox installed to navigate to certain secure sites because Chrome just doesn't seem to remember the passwords. Oh, and Chrome needs a search field on their password form (I've heard they're good at that sort of thing).
The font rendering in Chrome must be a Mac compatibility issue because side by side, Chrome renders text much cleaner than FF or IE on Windows. HN on FF looks murky by comparison.
Good point, but the UI's still inconsistent. If you open Options there is a Search options box. The passwords screen is modal, so that search box isn't accessible and you have two methods of search - a search field for Options and Ctrl-F for password. The other issue is that Ctrl-F doesn't consistently scroll to the highlighted item. When doing a Ctrl-F I often have to use the scroll bar to find the highlighted phrase.
Chrome seems to remember passwords just fine for me on Windows 7. But I don't like the fact that you can't set a master password. Yes, I understand that storing password in the browser is not exactly full of win. So I only use it for non-critical stuff, but I still don't want all that non-critical stuff open to anyone who sits down at my PC. It get's worse if you sync passwords between two devices. When some dude steals your laptop all of a sudden he has easy access to your Facebook, Twitter and HN goodness. Ouch.
The font rendering in Chrome must be a Mac compatibility issue because side by side, Chrome renders text much cleaner than FF or IE on Windows. HN on FF looks murky by comparison.