Allan Alcorn and Ralph H. Baer - you owe these guys
Ralph made the first ever home video game. First ever. It was entirely analogue and made up of discrete transistors. He patented it (along with 150 or so other ideas that he had) and got everything started. Allan Alcorn designed and built the first ever Pong game for Nolan Bushnell at Atari.
Then he went on to create the hardware for the first Atari VCS. That we have the video game industry in its present form is down to these two people.