Electric cars? Thing of the past. Electric aircraft!
Realistically, you need better cell technology to make electric aircraft viable in a general sense, in limited situations, like training where you need to have the aircraft flying for about an hour or so, it can work, but not in general usage IMHO.
For example, The Pipistral offering in this market, look at the stacks of cells, for somewhere in the region of 1 hour flight time....