The problem with FF and price, is speed of image processing and shutter. That is why we have the 1D' series. The 5D Mark II is great, but at only 4fps, this is never going to be a great sports, or outdoor enthusiast camera. I think the 7D is filling that performance gap, yes at the sacrifice of the FF sensor.

At the most recent UsOpen I saw almost EVERY photographer had a 1D, AND a 5D mark II. Now, granted, Canon basically GAVE the 5D to them, but they had the best of both worlds and they are ALWAYS going to be carrying/shooting with two cameras as it is.