I think an HD HFR 3D IMAX video of Mars in motion would be great publicity for NASA. But publicity would really be the only reason to carry the equipment to do that.
NASA is focused on the science, and they don't really even need color images to do the science. Curiosity does have the ability to take high res videos, but low framerate. I don't know why we haven't seen those yet. Probably because yeah they only have a certain amount of bandwidth a day and it hasn't been a priority.
James Cameron has your back...
http://www.space.com/11241-nasa-mars-rover-3d-camera-james-cameron.html
Maybe we'll get something on the next mission.