the only issue with a 4K video camera ... is you can't really get the full use of that in playback, at least not on any consumer screen.
and I doubt that's going to change anytime soon, since everything is just recently getting full swing into 1080p HD; doubt we'll be watching Netflix movies in 4K for a long time
Motion picture film cameras have been shooting 4K plus film for years. That's why 4K is the Holy Grail for digital. Think of this prototype as a digital cinema camera, not as a television camera.
c.d., good point about this technology being aimed more for professional filmmaking ... but the concept design certainly makes it look like its eventually intended for the consumer market, although it will be many years before that tech is cheap enough to get into the consumer price range. maybe by then we'll have 4K TVs to go along with it