Xbox 360 + 3 extra wireless controllers + Wireless adapter + VGA HD Cable + Plue & Charge Kit = OVER $700!!! And that's BEFORE the infamous $60 games!
Dang... Now I'm not trying to draw comparisons here, especially between two products we know very little about coming out at different time frame, but compare that price to what Nintendo is probably going to offer. If the system releases at $199 like GameCube (possible since they are passing on high resolutions) with $30 wireless controllers like GameCube, and since they've confirmed built in wireless and flash memory, you get a system with the same general features for about half the price. (You'd have to buy the DVD attachment and similar HD cables to match, so ~$350 it is.)
Now I realized I just compared a Nintendo system coming out a year later to a Microsoft system built for HD, as well as the Nintendo system's 512 MB of flash memory to the Xbox's 20 Gig HDD. Heck, my estimated prices might be entirely off; Nintendo's new "controller" could be $150 VR helmets for all we know. I'm shooting holes in my own argument to stress that I'm not trying to start a fanboy war over two products we know nothing about, but rather provide some frame of reference to get a grasp on just how stinkin' expensive this thing is.