First off, no, the Mars Rover concept is not an official NASA creation. It was built by the Parker Brothers, best known for making futuristic and outrageous vehicles for television and film. This concept will likely never see the surface of Mars but it is interesting in that it imagines what kind of vehicle a manned mission to the Red Planet would require. The Mars Rover concept measures 28 feet and has a top speed of somewhere between 60 and 70 mph.
As this rover was built to traverse the rugged surface of Mars it sits high off the ground and has airless tires to prevent flats. Its cabin also looks quite large, a feature which would allow for longer missions. Again, the Mars Rover concept was made more for fun than anything else. Still, it's always fun to see what private companies envision the future of space travel to be.