Sony was into motion control long before the Wii, actually (Wii concept began in 2001).  So, let's not feign ignorance here.  The EyeToy released in 2003 (design/planning began in 1999), and Move design/planning began shortly after that (In December 2004, a patent was filed regarding it http://www.engadget.com/2005/10/03/sony-has-its-own-magic-wand-in-the-works/).

"It appears to have been initially developed for the PS2, but has either been shelved or is pending release on the PlayStation 3."

Oh, I have zero problem with Sony or anyone else appropriating innovation from elsewhere and refining it.  I welcome that, it's absolutely pro-consumer.  

My question for you would be, why are you defensive about people pointing out that some of what people are saying in this thread, and especially some of the information in that silly graphic, is false?  Why would that bother you?  

The person who said that Sony copied the Wii U with off-TV display was wrong.  Why shouldn't I point that out?  Misinformation is bad.

What I believe annoys people, though, is how some pretend that Nintendo is somehow above borrowing ideas from elsewhere.  The Wii U controller, for example, uses dual analog sticks, when both analog control and dual stick placement came from elsewhere.

Alkibiádēs said: Kyuu said: Sony entered the console market quite late so of course they're going to copy many of the same ideas of the market leader while introducing new ideas. Like Nintendo was affected by Atari and others before them to an extent, but it's nonsense to claim that Nintendo can influence Sony and the opposite can't be true. Wii's motion gaming clearly took inspiration from Ps2's Eyetoy, (As did Kinect which was more of a direct copy) Sony also influenced Nintendo to eventually use the proper concept of Analog Stick (Dual) and ditch their incomplete single analog idea (which nobody will deny that it by itself is a great innovation) Copying and polishing ideas can help technology move forward. Being original for the sake of it is not beneficial for the industry. And there is the second screen thing, wasn't that first implemented with PSP-PS3? why do people claim Sony copied the Wii U? Second screen is the natural and expected evolution. Nobody's copying anything from anybody people! I gotta admit though, I'm not a fan of some of Sony's more blatant software rip-offs like the embarrassing Playstation Allstars, or "Pets" for the Vita. Not to mention Crash Team Racing but at least that game was excellent. I seriously doubt this, Eyetoy wasn't even released by the time the Wii was in planning phase. R & D takes a lot of time you know. They're not even remotely the same.

so what about the r&d for the eyetoy?

or did it just magically pop into existance with the wave of a wand

To be fair, it certainly didn't take Sony and Microsoft long to steal their wii idea with w.e they called their versions.

Nintendo made it popular (however briefly), and soon both had a version. That eyetoy thing you're referring to was certainly not the first attempt at motion controls, and nintendo had already dabbled in it themselves.

Hahaha, should probably research that a bit more.

Dangit you beat my edit. But yeah, Sony and Microsoft very much tried to capitalize on the motion controls fad that wii had going for it.

People are only picking on Nintendo for saying this because they are, indeed, nintendo. Companies ALWAYS keep the details of their future products secret, and of the three only Nintendo has really been attempting to do something innovative and escape the conventional (possible exception of Microsoft this past gen which blew up in their first)... main problem for them is most favor visuals and familiarity over said "innovations".

Instead of looking at this from a "war" perspective, let's look at it from an analysis perspective.

What does this mean?
It means that MS and Sony have the potential to take something from the NX and use it.

This can mean a few things:
It is a console, and uses a very specific "control style" that could be adapted for console use by the others.
What do the other consoles already have?
3d camera functions, gyrometers, touchpad, sharing.
What do the other consoles not have?
mouseball, controller screen, VMU, simplistic controller.

That's IF the NX is actually a console.
There's also the possibility that the NX is a "third pillar" console. A new console that operates separately from the handhelds and consoles 3ds and wiiU.
This is also a possibility since both Sony and MS could create something similar. See, NX CANT be simply (emphasis in simply. It could be a console. Just not a typical one) a new console, because sony and ms won't copy a console. They can copy a controller, or something OTHER than a home console.

So, let's imagine that my previous theory on the NX is correct and that it's a full-fledged tablet device. Could/Would Sony and MS copy that? I think they would.

I'll respond to your edit here, and just point out that I specifically said Wii, not Nintendo, or that Sony was first to the motion control game. 

I would honestly pick on any company for saying this, since it's the nature of all industry to innovate on other people's work.  Nintendo's done it, Sony's done it, Microsoft's done it, Apple's done it, Samsung's done it etc...  basically every company ever.

screen captures, gameplay captures, shaing of both through the internet to social media, live streaming, shared play over the internet, multiplayer across the internet without both people requiring the game etc are all innovations and are here to stay as gaming moves forwards

sure for a short period motion controls had a significant impact but what has become of them? they are pretty much dead at this point

motion controls were not innovative because the very definition of innovation is a concept that changes how a certain process is done and is permanently implemented going forward within the particular field

motion controls and i'd even venture to say tablet controllers do not fit this description; if anything the word "fad" is a better description

Yeh no worries Nintendo...