NASA is working on an UAV to fly above the surface of mars and take high resolution video of the landscape below. The ARES mission will involve a 6.5 meter wingspan UAV that will cruise along 1 mile above the martian surface. The cameras on board are very high resolution, such that, "if there was a candy wrapper on the surface, we could read the name and ingrediants off of it."
Once the plane reaches the surface of Mars, NASA plans on live streaming the video feed from the plane. That will definitely be something to watch for. No word on how long the plane will remain airborne.