I just ordered a 70D and am anxious to check out its 7D-like performance and video autofocus capabilities. I currently have a 5D Mark iii and a 60D and have been using ML for some time on both of these cameras. If and when the developers are ready to tackle ML for the 70D, I hope they can provide audio monitoring through the A/V out port (like on the 60D). Also, since the autofocus seems to be so fast on the 70D, another great feature would be the ability to slow down autofocus for shots where you'd want to have it look like a slow manual rack focus.