Why does everyone ALWAYS put a negative spin on anything Sony does? They don't deserve it. If anything, Microsoft deserves it, but that's another discussion.
Being more specific to this topic, there is nothing wrong with changing the way games are played to match another company. Hell, if companys didn't "borrow" idea from other ones, games would really suck. Things such as, say, the analog stick were made by one company at first(I believe it was Nintendo), and the other companys used the analog stick. Let me ask you this: Do you wish they wouldn't have use that idea? I for one am glad they did, and it furthered gaming. This is the same kind of thing.
Plus, this hosestly could be used for lots of things, not just gaming. And if they did use it for their next console, it would end up being a lot different from the Wii's controller.