Yes... And people said it wouldn't happen... http://www.canonrumors.com/forum/index.php?topic=12606.msg224974#msg224974
I don't think development of the big-MP camera started when Canon got wind of the D800. I think the sensor technology R&D may have been delayed due to the tsunami. So now they are behind Nikon.
Canon HAS to come out with brand new tech to keep the FF market profitable. Or go into the MF market. And it doesn't look like they want to do that. Once this new sensor tech. is released, don't be surprised in three to five years that they stop making APS-C cameras and go solely FF for DSLRS.. Even the Rebels. There is only so much more tech they can cram into the Rebel. Don't be surprised if the next Rebel is the last with an APS-C sensor.
I'm fine with the big-MP Canon coming out in 2014... But Canon has gotta hurry it up a bit. That rumored Nikon D4X looks to be my perfect big-MP camera and its going to look very juicy to many. The 1Dx is a fine camera. But its a sports-shooter. For us fashion-types, we want more MP and DR. I would bet that nature-types are in the same boat.
I don't think the longer-term Canon pros would switch, but this could put Nikon in a really good spot in the market for the next several years... Canon should announce and the big MP camera before the D4X. That would take some of Nikons thunder when they release the D4X.
Please Canon, come out with something that there is no question what is the best big MP-FF pro cam out there.