The big advance that none of you has mentioned, is the dual pixel focussing system, which for those of you who use live view, and/or take video, this could be a godsend.
Combine this with the rear touch-screen, where you can just touch where you want the exact focus point to be, and you can get great video out of it, without the hassle of manual focus.
Let alone Wi-Fi etc.
For many of its intended customers (and I don't include professionals here), the touch-screen, good autofocus for live view and video will be what drives them towards the 70D.
Ultimate pixel-peeping ability is not high on many people's list, although they want good quality, and half of these wouldn't even know what ISO is anyway.