Would be cool in the future with autonomous cars we will be able to have events where instead of having stations in a building that you walk to you would be in cars.  And whenever you switched you would change cars.

 

Bathroom car!  Would be too cool to have an autonomous bus/car that just drove around the city and people could request it and you would be able to go to the bathroom in it.  It could connect to the back of your car and you could walk into it.  Sensors would be able to monitor when you needed to go to the bathroom so that those vehicles could be positioned appropriately.