Some i imagine are annoyed by Sony's general two-facedness about the whole thing. That they did nothing but shit on Nintendo and Wii and then come out with something that looks extraordinarily like it, with games that are also extraordinarily similar, and suddenly motion control is cool to them
It doesn't bother me. You can expect companies to act that way. Like when Nintendo finally puts a competent online system together, some Nintendo fanboys will finally discover that they're all about online play, and Nintendo will act like they've got some sort of pioneering system. This is normal.