Bit of a loaded question there. You should have separated out copy and inspired because they aren't the same thing, and conflating the 2 the way you did requires people to accept the copy tag when they maight not agree with that assessment, but they totally agree with the inspired by tag. Like me.
Copy? No, definitely not. Copy means replication in both form and function. There is no factually accurate way in which you can say PS Move is a copy.
Inspired by, yes. Derivative, yes.
People using the term rip off are showing just how small minded they are when it comes to this sort of discussion. It's a rip off like the Mac is a rip off of the PC (or the other way 'round depending on your loyalties on that equally irrational and emotionally charged debate).
A rip off is the likes of those cheap Chinese PnP games machines that looks a lot like the Wii (or 360) but don't function like a Wii, but rather are completely inferior in every way to the Wii. And in many ways is used to trick people into thinking they're getting a Wii or something that does the same thing as a Wii but when you get it home and turn it on you find it's doesn't even deserve to be used as a pedistal for the Wii to stand on. So Bamboleo, your example is in fact an apt demonstration of how PSMove is NOT a rip off of Wii motion control, the exact opposite of what you were trying to convey.
The PS Move controllers look a lot like the Wiimote and nunchuck, and they generally do the same job. But functionally they are different, with the camera element making the total package very distinct and providing it with capabilities in excess of what can be achieved with the Wiimotion+ and Nunchuck. So PS Move brings a potential added dimension to motion controlled gaming over and above what's available on the Wii. That is the very opposite of rip-off when it comes to getting into mainstream motion controlled gaming.
Whether those capabilities (head tracking, voice recognition, full body motion etc) amount to anything substantially better for the consumer is yet to be seen.
So on balance I voted yes, because if Wiimotion had only met with only modest to slight success we wouldn't have PS Move, at least not this gen. Though I think mainstreaming of motion controlled gaming was always an inevitability and if Nintendo hadn't hit on the right formula this then then the right formula would have been found in a subsequent generation.
But, you can also say that PSMove is derivative of and an evolutionary step up from the amalgamation of sixaxis and PSEye. Sony has been in the motion control shpere since last gen and from the beginning of this gen, so they are not a johnny-come-lately me too outfit (which "copy" and "rip-off" are normally intended to convey). It just took Nintendo to shine a light on how to implement it most effectively for the mass market.
As has been pointed out Wiimotion is also derivative of / inspired by earlier attempts at motion controlled gaming. And who knows, Sony might have done Nintendo a favour in trying out the Eyetoy with the PS2 and it not catching on too well. If Sony hadn't tried and failed to mainstream the Eyetoy Nintendo might have tried and equally failed with it on the Wii. So instead they saw the limited performance of the Eyetoy and clearly dismissed it out of hand as a possible direction for their motion control mainstreaming plans. Sometimes you are inspired by other's failures as much as you are inspired by their successes.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
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