That completely defeats the purpose though. They're packing it in so developers will actually give it the time of day. Peripherals that splinter the market are rarely successful in the long run. Yeah, it tacks on additional cost and not everyone wants it, but it's pretty much the only way to ensure that developers will contemplate utilizing it.
I personally still can't see the value in it even with it being forced down ours and developers throats. It's just like the wiimote gimmick to me and that didn't translate into making very compelling games that were better than just pressing a button.