Burning Question: Why Do We Still Have Power Cords?

It's a good thing Nikola Tesla never figured out how to time travel, because that cord jungle behind your entertainment center would break his heart—again. It's been more than a century since he lit incandescent bulbs wirelessly in his lab, and yet you're still plugging into the wall.
Even your three-pronged socket looks surprised.
There are plenty of ways to beam volts through the air.