Right, but it could be a browser feature right? The main issue (for example in OS X) is that everything gets subsumed by the browser process so things like Com

Right, but it could be a browser feature right? The main issue (for example in OS X) is that everything gets subsumed by the browser process so things like Command+Tab don't work as well. There are, of course, also OS integration issues, but over time I think we'll get pretty far along on that front.