First of all, no one gets car sick while driving - already a major difference to VR. Secondly, most people who can get car sick can avoid it by sitting in the front row and looking only straight ahead.

Finally, even for people who get hopelessly car sick as passengers no matter what they do, the advantage of a fast safe private ride often outweighs the discomfort - especially since no one is spending more than 1h in a car more often than a few times a year. It is very hard to imagine what application could make VR give even close to the amount of utility that cars give you.