You read that title right. After years of waiting, Canon has finally announced that their Canon 5D Mark IV will be able to shoot 4k video!
The camera will utilize their new 30.4 Megapixel full-frame CMOS sensor which is a 6 megapixel increase from the prior iteration. This new sensor also allows you to shoot 4k video in 24 or 30fps. Just like the other canon DSLR's I've used for video, it does still have the 29:59 second limit.
One of the coolest photos on this camera is Dual Pixel RAW setting. What this allows you to do is make minute adjustments to focus and bokeh. Unfortunately this feature does take up 2x the memory, and decreases your buffer size for bursts down to 7 images.
The camera provides an ISO range of 100-32000, which is expandable to 50-102400! It also offers 63 points of autofocus, covering approximately 80% of the image plane.
For more information here is canon's product page as well as a video from Fro Knows Photo discussing the features of the 5D Mark IV!