But I read about this cool new technology in Time magazine this week. http://www.time.com/time/specials/packages/article/0,28804,1934027_1934003_1933981,00.html
It's a portable microwave camera that delivers high quality images of objects behind walls, floors, ceilings and other solid objects.
Not sure if it can reheat my mac&cheese, and it's a bit expensive, but very cool nonetheless...