Panasonic has done a tremendous job with the video quality on their mirrorless photography cameras (especially when hacked in the case of the GH2), but their video options in a dedicated camera have lagged behind both Sony and Canon, who chose to go with larger sensors for their dedicated video cameras. Now, it looks like Panasonic is trying to come back at the game at the lower end with a 4K-shooting camera, and give excellent capabilities in a small form factor.
Thanks to 4/3 Rumors, here is the rundown of the possible 4K Micro 4/3 camera: