Suppose self-driving cars are developed by then? A lot of car trips would be rendered unnecessary. Instead of driving a 2 ton car to the grocery store to get

Suppose self-driving cars are developed by then? A lot of car trips would be rendered unnecessary. Instead of driving a 2 ton car to the grocery store to get a carton of milk, the store would send a 100 pound driverless go-kart to deliver it. And imagine if you had your walls covered with monitors streaming HD video in real time. Video conferencing would be almost as good as face to face contact, again rendering a lot of car and plane trips unnecessary.