I think that once driverless cars are mainstream, which I have no doubt will eventually happen, it can usher in the age of the (driverless) flying car... finally! There seems like quite a bit of technological overlap, and from a safety standpoint I would much rather have people flying around in automated vehicles than human controlled.
If this came to be, coupled with high speed wireless, I would go so far as predicting the end of cities as we know them. They would serve essentially no purpose anymore.
Flying cars are uncommon not because they are dangerous, but because it requires a huge amount of energy to defeat gravity in addition to propelling the vehicle forward.
Cities are more populous and wealthy than ever before because there is no substitute for human proximity in a service economy, and more humans in close proximity makes for more productive services.
If this came to be, coupled with high speed wireless, I would go so far as predicting the end of cities as we know them. They would serve essentially no purpose anymore.