I can completely understand a Photography only, dedicated FF model at a sweet price point. But THAT should be the addition to the current lineup. I also wouldn't mind paying "slightly" more for the next 5D Mark III (or the new equivalent if they are re-naming things) if that continues to progress and be what it is to so many for so many different reasons. For example, if it needs an extra processor, or to remove that stupid 15 minute recording limit UK tax (although artistically that really doesn't bother me).
What I don't want, is some outrageous price to get all the features of both video and photography that used to sit comfortably in the 5D II price range for a single body solution. I also don't want to have a video camera that lacks updated high end still photography features of the new generation of DSLR, and vice versa I don't want a still camera that doesn't push forward hard on the video features we have all been expecting out of the MKIII.
4K may not be needed, however without it, I think they need to at least include, a safe frame margin to work within, this way if you bump into your tripod or the like, you can fix that little hiccup in editing because you have additional region beyond your 1080p recorded. If you nail the shot you can just scale it down to 1080p keeping the full frame, but if you have some editing required, you now have some breathing room. As well, RAW capture (even if it required an external fast storage solution), extra framerate capture, etc. etc. all the stuff everyone is always saying they want.
And then obviously, the great photography improvements as we are seeing with the 1DX. If I want two bodies, it's because I need two bodies that BOTH do awesome photography and awesome video. You need at least two cameras in almost every video situation, and sometimes it's convenient to carry two cameras or have an assistant/second shooter for still shooting. I'm certainly not going to buy 4 cameras for these needs. Either way, the revolution in DSLR was that they were merging video and photography and that is why I got involved in the first place. It was be a severe mistake by Canon to overlook or mis-understand that.
Otherwise, so long as the new announcements don't compromise what we have all been coming to expect and investing in, I'm actually now after digesting it all, pretty happy about the new announcements as it's options for rental if any budget allows for it and it makes my current equipment compatible with some pretty cool high end stuff. The new Sony EF Red also looks like a great addition for rental. I just don't want, to see any detractions from the natural progression DSLR was heading in before investors and marketing dufasses got involved, and fear that without feedback from the community they might make some mis-understood blunders. Also, anything Canon doesn't do, someone else will, because the current technology makes it all possible and contrary to what I am sure is popular belief, this tech is already mass-marketable, mass-produce-able and it can be pushed a lot farther than the generation models we have without modern day miracles or marketing pretending like we are asking for too much.
Also, side discussion, Hollywood and TV are slowly on their way out as the internet consumes everything. Just another thing for Canon to keep in mind before it scares away what could very well be their long term future.