Once someone discovers over-unity power generation and we have airborne cars then this would be a good idea. For road travel there are too many variables really. What would you use to reference the road? What happens when the road conditions change such as from asphalt with legible lines and similar to a windy dirt road that looks completely different, from a computer tracking perspective?
Also for poor weather driving and similar for ice or different variables in traction in the road surface I don't imagine it being that viable in the near future.
Well I do see all of these things possible, with captors and other technology.
Reference the roads? GPS or future GPS like technology (Galileo should be working by then...)