It could be the 5000 mm lens with image stabilization that keeps a handheld camera looking as if it’s on a film head. The massive touch screen rear face, the multi-face portrait capture, or any number of other features that make this concept simply amazing- if it weren’t for the backpack that the photographers use to provide the horsepower for the live demo.
That said, we hold cell phones in hour hands with more computing power than laptops of just a few years ago, so you can expect that in just a couple years, the horsepower in that backpack will be on a chip that can fit in the camera. We live in amazing time. YouTube video from the Canon demonstration is after the break.