OS 11 is just a name. What do you mean by OS 11? The OS that follows OS X 10.9? OS 11 could be the next OS after 10.5. It could come after OS X 10.156.
I suppose you could see OS 11 as the "next transition" (System 1 through OS 9 where essentially the same thing and lasted 15 years). In which case it would be a big difference from OS X, ie no more UNIX. I wouldn't expect that any time soon.
Then again is could just be a marketing thing. In which case, anything goes - free for all.
However, I think I remember from a Stevenote that OS X would be around for 10 years... So maybe 2010?
I suppose you could see OS 11 as the "next transition" (System 1 through OS 9 where essentially the same thing and lasted 15 years). In which case it would be a big difference from OS X, ie no more UNIX. I wouldn't expect that any time soon.
Then again is could just be a marketing thing. In which case, anything goes - free for all.
However, I think I remember from a Stevenote that OS X would be around for 10 years... So maybe 2010?