How about the one that drives itself?!
The Tagabike—which converts a million different ways to let you either stroll or bike your 6 month to 4 year old kiddo around town—is pretty much Fifth Trimester dream territory. Imagine commuting your babe to daycare in this, or getting your exercise on the weekend with baby in tow? And yes, they make it in a double. And it has an adaptor for your car seat too.
And the two Dutch engineers in this video are my nominees for the Nobel Prize for Parents (which totally should exist). They used car technology to create a stroller that stops automatically before bumping into anything and can follow you down the sidewalk. Watch them prank these cute unsuspecting Europeans....