They would, but they could get away with much less bandwidth if the UCAV's control is largely automated. It's the video feed that is the killer. In the proposed configuration (VR headset) you must provide 360° footage (with a camera rotating with the pilot's head movement the latencies become too large), and all that in high resolution, and you can't use a high bandwidth laser beam to a satellite (latencies, again, and dependency on the satellite network). Sending an analog signal would be bandwidth/energy consumption prohibitive. Digitizing the video stream invokes latencies - the more, the stronger you compress the video, but compressing it you must.