However, if incorporated as a core part of the 360, the peripheral wouldn't need relatively deep market penetration for devs to offer a motion control scheme along with traditional control scheme.
sixaxis is standard with al PS3s, but how many devs are really making the most of it, let alone adding any useful measure of motion support to games? A tagged on motion-control scheme to existing games isn't going to sell XB360s to casuals any more than Halo 3 on Wiimote would sell Wii's to Wii's current market. Now *if* MS could map existing games onto motion control, so you could buy the peripheral and have existing games use it, they might get somewhere, at least in selling a peripheral to existing XB360 owners. But the absence of nunchuck type second control input puts a damper on that idea.
Motion control on the Wii becomes less attractive the moment you can say the 360 and the PS3 offer close alternatives.
Which is a big *if*. Look at how MS have competed with EyeToy... They haven't
They've made nothing of the camera peripheral, and aren't showcasing motion controls through that in stores. It doesn't take a Wiimote to compete with Wii - the right hardware (which is out) with the right software (which is missing) would work. Neither company has rolled out real competitors with their existing options, despite plenty of time to knock up a Wii minigames motion-control library.
...it practically forces the Wii to depend more other aspects such as brand, library and price.
Which places Wii in a strong position! how many people looking for a portable music player shop around options, versus buy an iPod on name? And the Wii would be in a stronger position than iPod because it'll have the existing IP's people know. 'I enjoyed Wii Sports round my mate's house. I'd rather buy the product I know I like than a similar looking thing on a machine I don't really know about.'
I agree that MS and Sony can compete with Nintendo, but it'd need a major,
major push. Both have put their eggs in different baskets and any movements in that direction are an afterthought, closing the door after the horses have bolted in the vague hopes a few horses remain.