This camera, based on the rumors of course - is looking to be a big win.
Here's my take on the new features/upgrades that are looking very good -
30.4mp - Very well placed do-all MP count, IF the ISO and DR performance holds up.
7fps - nice upgrade, fast camera for the FPS.
100% viewfinder - good. No 97-99% nonsense.
LCD tone adjustment (warm / standard / cool1 / cool2) - better to have and not need, than need and not have!
Dual Pixel RAW -- Not sure if this will help with DR, but adds creative possibilities. I don't suspect it will be gimmicky, but perhaps not revolutionary either.
New noise reduction algorithm - always welcome, assuming noise control will actually be better.
-3ev (-4ev in live view) -- to be expected, and much needed. -3.5 or -4ev would have been better, but this is good enough. The -2ev of the 5D3 was not cutting it at all. A few times I had to switch to my 6D because the 5D3 wouldn't lock focus in a dark reception hall leading to missed shots.
150,000-pixel RGB + IR metering sensor. 252 zone photometry -- Better metering always welcome.
EOS iSA system
EOS iTR system
Anti-flicker - A must have feature now.
ISO 100-102400 (extended sensitivity) - good. Based on photos, expecting 32000 top end, which suggests about a 1/3-1/2 stop improvement.
24/30fps @ 4K - all the video stuff is a step up, even though the video fanatics will bash it compared to other brands. It's a DSLR, not a movie camera. For the vast majority of users, these video features are pretty strong. If they aren't up to your needs, you are a serious power user that needs to step up to dedicated high-end video equipment. Or you can just keep your overheating Sony and troll webforums. Just my $0.02
60fps @ 1080
120fps @ 720
8.8mp still from 4K video
New Picture Style “Fine Detail” - nice to have when working in JPG.
Time-lapse movie - More creative options without having to buy additional equipment. Nice to have.
Built-in interval timer and valve timer - More creative options without having to buy additional equipment. Nice to have.
Mirror vibration control system (MVCS) - Very nice, this will improve sharpness. All the megapixels in the world doesn't help if you can't keep steady as possible. A perfectly still 20mp image trumps a vibrated 50mp image anyday.
GPS built-in - ok.
Wi-Fi - very good. Hopefully a better implementation than in the past.
FTP · FTPS can be transferred wirelessly also only in the body -- if this is for image file transfer - BIG WIN. This would make the Eyefi cards obsolete. I'm hoping this is what this is referring to.
NFC - ok
SD / SDHC / SDXC and CompactFlash TypeII -- this is a win because it isn't an "upgrade", no buying stupid, expensive proprietary cards and readers that offers no real world advantage for this camera.
USB 3.0, HDMI, microphone -- good. USB 3 is fast tethering. Wish it were USB-C.
Battery: LP-E6N / LP-E6 -- another win, no need to buy new set of batteries. At $50-$60 a pop, this adds up just like the memory cards.
Looks like memory cards and batteries are left the same - that way, the upgrade choice is a lot easier as no one has to factor in the high costs of batteries and new cards. This is a smart move by Canon. For the base price, you can upgrade, not the price of the body + hundreds more for batteries and cards.