I also wonder how well a new browser will fare. Opera’s had arguably the best browser out there for years, but no one really cares (including me) even now that it’s free. In one way I’m surprised at Safari’s success, but then it’s less surprising considering the “do what you’re told” mindset of the cult of mac. IIRC, there’s a windows version of Safari, but I don’t know of anyone who uses it nor how well it’s doing.
The competition will hopefully spur innovation and help the browser that I’ve come to like even if I don’t end up using Chrome.