This is just a stellar article that shows non-avid gamer (being gamer and non-gamer) reactions to one writer's Wii and PS3:
The PS3 is truly cool, but substantially the same. It just doesn't offer much. So my dirt-bike can break apart into a thousand pieces, the drive chain and spokes and engine... that's neat. The SixAxis control scheme is far too sensative (which means using the thumbstick was better, and I tried doggedly for 15 minutes to like SixAxis).
On the other hand, pick up a Wiimote and take a swing at a tennis ball and you're there.
Wii got it right on the fun & price departments. There's just not much else to say, but marvel at these gamers and non-gamers coming into contact with both of his consoles at the same time.