Panasonic is showing off a prototype of a 4K micro four thirds format interchangeable lens camera. It looks just like Panasonic's video-chomping GH3.
We don't know much about the forthcoming prototype, but we're told that it's more than wankery and that we'll see a product in the near future. Panasonic is showing a prototype of a SDXC speed class 3 card for use with the camera. It's rated at a minimum transfer rate of 30MB/S so it can handle all the data that 4K entails.