We walk you through some of the recently-exposed features coming down the pike for OS X users this summer in the form of OS X 10.8, Mountain Lion, including Airplay screen sharing, iMessage for the desktop, Notification Center, Game Center, enhanced iCloud integration, calendar/notes tweaks, Reminders (with iCloud sync), additional Twitter integration, and the dreaded Gatekeeper/App Store Software Update combo. And hey: Even if you don’t care about OS X, you can always enjoy us arguing about the ethics/efficacy of sandboxed apps.