Nokia has reportedly been dreaming of PureView phones with 4K video; as of today, OmniVision is walking the walk quite a bit earlier. The 16-megapixel resolution of the OV16820 and OV16825 is something we've seen before, but it now has a massive amount of headroom for video. If your smartphone or camcorder has the processing grunt to handle it, either of the sensors can record 4K (3840 x 2160, to be exact) video at a super-smooth 60 fps, or at the camera's full 4608 x 3456 if you're willing to putt along at 30 fps.
