And, to be honest, betting against Nintendo nowadays is pretty easy. They always outdo themselves in making irrelevant hardware...
Out of their four most recent hardware releases only one was a genuine flop. The 3DS is a big drop-off from DS, but it isn't a failure at all from a general standpoint. The other two were big succe- whatever, why am I even trying? I'll proably get a "WIi was a fad"-response next anyway.