The EyePet is a MUST have if you have younger kids. Also, the PS Move is definitely 1 to 1 control. You can turn the Move into certain toys and tools on EyePet, and it moves where you move. There is no lag that I seen.
I didn't get a chance to play all the demo's, but I did manage to play with Start the Party, Sports Champions, Raquet Sports, and Beat Sketchers.
Beat Sketchers a type of paiting music game. It was OK, the music was kinda annoying. But again, painting shit on your screen is pretty cool. My daughter got a kick outta it.
Sport Champions and Raquet Sports are pretty damn cool, and a lot of fun. Raquet Sports takes some getting used to due to the fact it is in 3rd person, so you have to time your swing. But Sports Champions is spot on.
Now Start the Party. AWESOME!! This is definitely a cool have the friends over, have some drinks, and play some Start the Party. What makes this more fun than Wii, is that it puts you into the game. It just feels better when you see a cool sword in your hand or a tennis racket. And this game has you waving your arm around like a crazy person, and again, I didn't notice any lag. I'm definitely gonna get the full game.
So far, I do NOT think the PS Move is a gimmick. It is fun as HELL!! And has a ton of potential.