On the other side Chrome based Opera is also starting to look pretty good in it's own rights: it's fast and snappy, mouse gestures are there if I'm not mistaken, page stack (or whatever the name is) is cool. If I would to choose between Chrome and Opera 16 now I would go with the latter (also because Chrome really pushes too much Google on the user).
It's one of those features other browsers simply do not have (Opera has a couple more but this one's pretty unique) that I really do use several times a day, and I'm not "upgrading" until I know they won't take that away.
Not that it matters too much, features or not, I'm thinking to switch to Firefox because these are times no longer to be using closed-source software.