It's just as good at 4K video as it is at still photography
Improved; faster autofocus; Up to 11 fps (mechanical) or 30 fps (electronic) continuous shooting; Powerful 4K video-creation tool; Sharp; fluid EVF is a joy to look through; Usability improvements to buttons and dials; Great-quality images right out of camera
No in-body image stabilization; Rear LCD doesn't flip around for vlogging; Shallow grip isn't the best fit for large hands; Battery life still demands carrying a spare