During the digital transition, we had to buy new bodies and new lenses. My understanding is that the transition to 4K will allow the same exact lenses to be use

During the digital transition, we had to buy new bodies and new lenses. My understanding is that the transition to 4K will allow the same exact lenses to be used whether on a new body or the same body with a swapped-out sensor train. Going to 16:10, as I understand, would require new lenses, which is part of the reason NHK's demonstration of 4K equipment as a straight multiple of 1080p was desirable. I'm not an expert on the mechanics of how a lens works; I merely know enough to operate the camera and shoot a decent scene, and part of that is lens selection. If you can operate a 16:10 sensor behind, say, a HA18x7.6BERD with square pixels and no distortion or image loss, I stand corrected, but I don't think that's the case from my experience. Again, though, I just pushed buttons (in a single industry application of "transmit picture through lens and apply to persistent storage", television ENG/production), and I didn't take gear apart. I know there are lenses today that can operate at 4:3 and 16:9. Maybe the same concept?