Hi! While ML's new features can be very useful for a lot of people, I probably won't use them very much, and those I would be most interested in (airplay, power nap, quicksync) aren't available for my laptop (a 15" 2010 MBP). The main reason for me to upgrade is ML performing better than Lion on my computer. After reading some posts here and there talking about the new release I'm wondering if ML is really a polished and optimized Lion or it just adds some iOS features. As far as I know, Apple has not advertised any core system enhancements like they did with SL, due to its marketing strategy perhaps? What do you think?