My 2010 MBP, which is obviously getting long in the tooth, saw its battery life double with the Mavericks upgrade. That alone made the transition worth while. P

My 2010 MBP, which is obviously getting long in the tooth, saw its battery life double with the Mavericks upgrade. That alone made the transition worth while. Plus, there were a ton of small refinements that I got used to very quickly. I didn't notice how quickly until I switched back to a Snow Leopard install I maintain for Final Cut Studio (don't get me started on FCP X). All of a sudden the old OS felt...outdated. Totally reliable, sure. But not quite as friendly. One unexpected change is that Safari has become my favorite browser. Its integration with the OS and iOS, plus the integration of iOS and OS X gave it an edge that Chrome and FF can't match. Judging from what was revealed today, it's looks like that kind of seamless transition between devices is what we can expect a lot more of.