Good to know that. I heard here and there some speculations, but it's the 1st time I really see something official. I'll patiently waiting these days
There is nothing official yet. As you can see, the WWDC site is still caught back in 2012.
Don't be so glad about yearly upgrades of Mac OS X, Apple seems to have it ****ed up in some ways with
Mac OS X 10.7 Lion and wanted to paint over it with a newer shiny version of
OS X 10.8 Mountain Lion. An upgrade every two years seemed to have fared quite well with Mac OS X before since
Mac OS X 10.3 Panther at least, but I guess Apple wants to keep up and go ahead with its OS X version like it does with its iOS version.
But then again, I am not a proponent of Apple's current Mac OS X strategy and am still using the Windows XP of Mac OS X,
Mac OS X 10.6 Snow Leopard.