Nintendo is trying something new, Microsoft and Sony are just making better hardware, nothing new, just better graphics.
Nintendo is making something that could change console gaming. And they will have 30 games on release. So in the end... 250 dollars on a console that has 30 games and is something new 350 for something that you have already played but better graphics 800 for something that promises a lot and is the same old thing but yet again, with better graphics.