Vehicle-to-grid technology
Moving electricity from one place to another sounds pointless if you omit the purpose, which is to provide power where it is needed from a location where it is not.

Consider for example these points on the Wikipedia page about vehicle-to-grid:


  
  A hybrid or Fuel cell vehicle, which generates power from storable fuel, uses its generator to produce power for a utility at peak electricity usage times. Here the vehicles serve as a distributed generation system, producing power from conventional fossil fuels, biofuels or hydrogen.
  A battery-powered or plug-in hybrid vehicle which uses its excess rechargeable battery capacity to provide power to the electric grid in response to peak load demands. These vehicles can then be recharged during off-peak hours at cheaper rates while helping to absorb excess night time generation. Here the vehicles serve as a distributed battery storage system to buffer power.
  A solar vehicle which uses its excess charging capacity to provide power to the electric grid when the battery is fully charged. Here the vehicle effectively becomes a small renewable energy power station. Such systems have been in use since the 1990s and are routinely used in the case of large vehicles, especially solar-powered boats.
  


The whole purpose is to put power back into the grid where it can be used, instead of just wasted (or not realized).

Consider a simple example: A solar panel on a vehicle that is not in use and fully charged, is being underutilized. If your neighbor has just returned from a drive, power that your panel produces can be sold back to the utility and delivered to the neighbor.