The surprise is that the 70D will focus better than the 1DX and that only Rebels and xxD will get top AF from now as Canon respond to constant cries that the lower tier bodies always have worse AF.
Somehow I don't think that it will have more capabilities and 'focus better' than the 5d3/1DX. From what I've seen Canon has a history of introducing some new bits of technology in various forms in the lower end models, and once they see if it's useful or the kinks get worked out, they put it as a flagship feature in the top end cameras, but doing it better.
Not having used the 7D, I've heard it's AF control interface is similar to the 1DX and 5d3. I'd guess Canon was testing out that way of AF control, and found that it worked well and just improved/tweaked it a bit and used it for the 5d3/1DX AF control.