There’s one invention that has never really advanced since it was created back in the 70's. The Microwave. It's still pretty much the same basic concept as it was all those years ago.
Mark Rober decided he wanted to make microwave cooking even more efficient. He set about creating a microwave that has an infrared and heat camera so you can actually watch your food heat up on your smartphone while you’re in the other room.
You can see more of Mark's prototype microwave here http://www.bettermicrowave.com/