My opinion on all this:
When I first saw the wii, I thought "controls won't deliver, it will flop". I was right about the controls (see the later inclusion of motion plus). I was wrong about its success. From all the people I know, everyone bought it after playing wii sports as a friend, and leaves it alone now. Still other people continue to buy it as they try it at friends.
Sony introduced its motion thing too, control will deliver, but I still can't see what's so fun about it. People will be like "meh, it's like the wiimote, sony is copying" and won't buy, and they'll be right not to.
MS demoed his NATAL, and everyone was like "WOW", because MS sold them the dream that they could finally really get into the game(what nintendo did at first, remember the discussions about light saber battles?). And if they can make this dream live up, they'll sell A LOT, just like Wii did (does). But I still think that even if the technology is perfect, the gaming uses are close to zero. You won't be into the games, you'll do gimmicks in front of cameras, and everyone who played with eyetoy games knows that it's not so fun... 3d detection won't change the fact that you can't walk, turn, roll, jump in the game... So they'll have to come up with a really new kind of games.
I don't see this coming, but who cares? it will sell. A lot. Because people already dream about it. It's a good first step into virtual reality. And people want that.
They will know Helgan belongs to Helghasts
