Apple announces the next major version of Mac Oh Es Ten, code-named Mountain Lion. Among the features interesting to me:
Messages, which I assume is the replacement for iChat, and integrates with iMessage on iOS.
Flickr sharing inside the OS via the new “Share Sheets” feature.
Notification Center, which is the Growl-killer we’ve all been expecting for some years now.
Full list of stuff at the Mac OS X Lion Features page.