I have been watching gleefully awaiting this camera and I'm very excited by it. My 3 biggest "wish" list items for it are:
*Superb AF - Based on the current rumour of a first-ever 65 point all-cross type AF system, then I expect that hope to be met and exceeded. I was already excited just when I though it was going to be the 1DX style 61 AF point system with 41 cross-type. I would have even accepted fewer (say 41) AF points based on it being crop-frame. But to think it will have a brand new AF system that is potentially already superior to the 61 point system of the 1DX/5D3 is rather mind-blowing. The gilding on the lily will be if the expectation that DPAF will work in conjunction with the AF system to increase speed and hold accuracy.
*Fast FPF - Based on the rumour of it being 10fps, I am well pleased. The previously rumoured 12fps was even better--and I don't agree with those who say that was unrealistic--but 10 fps is a match for the 1D IV and that is impressive!
*Deep buffer -- Not much has been said about buffer, but with dual Digic 6 I think the buffer will be deep. Hopefully somewhere around 30 RAW or more.
In effect, I think this camera will more than meet my needs. It will be even sweeter if there is new sensor technology incorporated that gives a substantial IQ improvement over the 70D, but that is less critical to me than the other features I've listed. It should at least match the 70D for IQ--and hopefully betters it to a degree.
The absence of a touch screen (if true) does not trouble me overly. I'm surprised, but not overly concerned. I don't concur that "DPAF is useless" without it. Sure, it will allow rack focus for video and easy AF selection for live view, but the joystick can still be used for such things. Moreover, you still have the DPAF working for you to automatically use face detection for video and live view. In my case, video and live view will be minor usage--90% of my shooting will be viewfinder--and I'll STILL reap the benefits of DPAF for assisting the standard AF, assuming that is implemented.
Lack of WIFI, (again, if true) is surprising. Would be useful, but not critical to my photography.
I will have to save up for it (have a good chunk already) and I want to watch for any bug fixes and firmware, which are inevitable with any new product. But I'm very excited for this camera and I think it's going to ROCK!!!!!!!!!