Gamers need a controller to enjoy gaming, yet you've never experienced Natal so you can't really say if it will work or not. If hardcore gamers, like you say, find it enjoyable, then trust me Natal will work!
Random game thought :
Why is Bionic Commando Rearmed 2 getting so much hate? We finally get a real game and they're not even satisfied... I'm starting to hate the gaming community so f****** much...