Google has gone a step further with its Chrome browser. Anyone logging in with it can carry bookmarks and passwords across multiple computers, smartphones and tablets. The drawback is that Google picks up a lot of personal data in the process.
+1 for all the reasons you mentioned. I have been using it since version 3 when tabs were still a mind bending concept.
I just hope the switch from Presto to Webkit will make it slightly faster. Running Opera on a sub 20W PC is not as slick as Chrome when it comes to typical Web 2.0 sites like Facebook, Youtube and Gmail.