Yeah, but the Campy stuff is so much better.Spoke to an owner of an LBS here in Brooklyn a week ago – he expects 105 12-speed mechanical to be released in the coming months. He sounded confident and matter-of-fact as he told me.
I'd be pretty surprised if Shimano simply walks away from market dominance of mechanical groups that are spec'd on mid-level stock bikes (~$3K price point). It would leave a huge gap in the market that SRAM would be able to exploit (faster than Campy, as they have more manufacturing and marketing muscle).
I think its a huge mistake to walk away from mechanical groups and have 105 and below be the only alternative. My guess is Ultegra and Dura Ace will eventually have mechanical options, after Shimano first tries to saturate their market with electronic only alternatives. This is a marketing ploy. And a good reason not to buy their stuff.