I've been looking for a replacement for my T1i for some time. I wanted to wait and see what the 70D offered. Right now my budget (based on some assumptions) will allow for either the 6D, 5DMII or a 70D.
I'm going to wait and see what the more educated say about real world results on the 70D. Particularly, I'm interested in low light (noise) handling. Of course I'm interested in dipping my toes into the FF world, but that option will trigger the sale of my EF-S 17-55 and the acquisition of something like a 24-70 or the 24-105 (more realistic). I can't imagine that both the 70D or the 6D aren't worlds better with AF than my current camera.
It's good to see the 70D look like a step forward instead of the sidestep that the T5i looks like. It sure makes next year's rebel and the 7D upgrade seem a whole lot more interesting.