Tilt-shift photography, invented to shoot architectural elements without lens distortion, has recently come into vogue in forced perspective images. It's also a great way to make cars look like adorable little toys.
It's natural to be fascinated by things on the extremes of existence, the very big and the very small are always captivating, so that's probably the reason making big things look like little things is equally fascinating. We especially like the race scenes for some reason, perhaps a leftover from our days as an amateur slot car racing pro.