One thing wireless controllers need is a rechargable battery (like the one we're seeing in PSP, DS and SP) and a "recharge dock" where you simply put the controller for it to charge while you're not using it. With that you could still include the rumble feature i think. I expect/hope to see next gen consoles do this.
edit:
edit:
hmmm... i see my thoughts are been stolen again.Vlad said:I'm all for that, as long as two conditions are met:
1) The controllers have a rechargable Litium Ion battery, and come with a charging cradle (like a cordless phone). That way I can just pop it back on its cradle when I'm done with it and have it back to full juice the next time I need it, and I don't have to worry about replacing the batteries.
2) They must have the ability to turn the system on. That way, the "couch potato" factor can be complete. If I've got a nice usable, responsive wireless controller, I want to be able to turn on the console with it, so I can just go from watching TV to playing a game with a minimal amount of effort.