Apple - OS X Mountain Lion. Innovation comes back to the Mac.
Looks pretty cool. I'm using Messages Beta, and it works well with both Jabber conversations as well as iMessage stuff from phones. I like the Gatekeeper idea, so I can continue to install whatever the hell I feel like installing, and yet confine my wife's computer to the App Store.
That looks pretty awesome. I might even pick up an AppleTV for the airplay feature.
Hopefully it's priced the same as Lion.