I'm not planning on getting the Wii for a while, but I wanted to try it, so I went to the EBgames in my local mall. So I ask to borrow the remote.
"Sorry, the batteries are out of power"
So I played some Off-road Truck game on the PS3 instead. I turned the Motion Sensing on, and pretended I was playing Excite Truck. The game even had overheating, speed boosts, crashes, and all of that stuff.
Half the playable consoles I see at stores are unplayable. The Wii demo units may do even worse...