Same here. There are some performance tweaks, but beyond that (as a single screen user) I don't see many killer features really on a end-user level.![]()
The changes are mainly fixes for stuff that should have been in OS X years ago. One big one being the fixed multi-display support (i.e not having a crappy texture on other displays when you go full screen into an app).
Thats a big deal for anyone who does serious work on a mac.
Other than that its really just the usual fluff that Apple Marketing love to do to make things look better than they are (prime examples being adding Maps and iBookStore and claiming they are OS features). Things like finder tabs are a nice addition, but again very late to the party.
OS X has seemingly been in 'maintenance mode' with regards to development for several years now. Sure, they throw 2 or 3 compelling features into the OS each time, but in most cases its stuff that you'd have seen people wanting for years and wondering why it was never there in the first place.
I really don't get adding Maps into the OS though. Theres no need to do that. If people want it, add it as a downloadable app for goodness sake. Don't bloat it onto the OS.