for natal you have 2 hands, 2 feet, head, voice, and a body. The game is designed for 4-8 buttons + analogstick + motion controls in both hands (or at least 1 hand).

Natal will allow you to swing both hands, maybe walk for moving, but what about those 4-8 buttons? hand gestures wouldn't really work, as we're already using 1:1 for the sword. Your feet would be used for walking, else you could map buttons to that but that seems really stupid. So, you want to shoot a badguy? Quick, yell "Gun!!" to bring up the gun, and then "Bang!" to shoot the bad guy.

The Sony Wand has some buttons (at least it looks like it does) and has motion control for 1 hand. The only problem (as they stated) is the lack of an analogstick. They could use the dualshock 3 (as in Resident Evil), but obviously this developer either doesn't know about Resident Evil or considers that such a bad solution that he would never do it.

So, you can see how Natal in its current form (how it has been explained to the consumer) might lead a developer working on a Nintendo title, who isn't really dedicating time into figuring out all the interfaces, to not know how to put it on Natal. As for being superior. Tracking entire body movements via camera only is leaps and bounds more difficult to do than to use accelerometers, gyros and a camera (with a special light on the controller) all combined just to track a single wand.

Also, sometimes the simple tool (Arc) is the better tool for the job than the extremely complex one (Natal).

(okay, this post turned out way longer than I intended )

It doesn't follow that Natal will simply be better for everything.  TBH, if they really stick with the whole 'no controller at all' then I think Natal will cover less existing genres than the Wiimote/Arc may be able to, requiring very specific games.

For this, I can easily see how holding something that feels like a sword in your hand and moving it would be better than holding nothing and trying to swing your hand about at different angles as though you're holding a sword.  I'm not sure Natal detects fine enough motion in that manner, for example a gentle tile forward of the blade while otherwise holding your hands still.

Yes he doesnt consider this as an real option imo its too stupid to be true I mean DS3 in one hand ?? Come on thats just silly its so stupid I cant find words to describe my feelings about that. And I believe Sony will release a Nunchuk type device and give some proper informations at GDC about it. 

It would probablty work... but would it sell? I somehow doubt it :|

Then they should make a port to the ps3 with special stuff just like every late port.

it's worken so far.