Several disparate thoughts, but related to the subject at hand:
1. After reading about the XC10, which dpreview says is equal parts video and stills camera, I ran a small experiment with both my FZ200 and LX100. Both will shoot video and the LX100 has the ability to extract stills from high-res video. The question I wanted to answer was, "Can I shoot stills while shooting video with either of these cameras?" The answer is YES! and the activation of the stills shutter doesn't seem to affect the video quality, which appears uninterrupted. I was going to try to post the results here at PL, but that would involve uploading YouTube videos, etc., and I lost interest. But take my word for it, with the FZ200 and LX100 you can shoot stills while shooting video.
2. In a galaxy far, far away, long, long ago, I ran a two-man video production unit at GE's Research and Development Center outside of Schenectady, NY. It takes a huge amount of work to produce really good video. Why? Because every frame we see is automatically and subconsciously compared to the extremely high quality video we see on broadcast television. Great video requires great planning, great scripting, great shooting, great editing, and every step (at least back when I did it) was fraught with great potential technical peril. Unexpected issues can bite you in the posterior when you least expect them. I'm just saying . . .
3. Finally, IMHO, good video virtually requires a tripod or steadycam for steady shooting. A lot of the handheld stuff I see makes want to mainline dramamine (an anti-nausea medicine).
Cheers, Jock