in case any one wants to have a clue as to what MG might be talking about, and I'm only guessing because he didn't specify, skip to 6:21 in the video.
and if that's the case, that's exactly why Nintendo tries to keep it's cards so close to it's chest, so that competitors can't come to market with something similar before they can launch.
Something like a unique controller shouldn't be what defines your latest game console, though.
Tired of the emphasis being on controllers. Let us play with power!
The idea could have been much more than "the controllers detach" that needs to be protected. The very idea of it though is what produces cheaper knock-offs of the idea that make it to market, or at least public presentation, first.
Nintendo's idea could be more along the lines that the controllers detach so that the handheld can just be a tablet, or re-oriented into vertical view, or attach to a dock and/or become secondary screen to the TV while the controllers now act as independent wiimotes/wireless controllers used on the TV. Which would be quite unique for a home console/portable handheld hybrid.
But then we see something come to market where it's just detachable controllers to an existing phone or tablet, it kinda of cheapens the idea.
Much like when the Wii was released and then there waggle stick tv game knock-offs for a fraction of the prcice that hardly did even part of what the Wiimotes could do.
Seeing that vid of the tablet with the detachable controllers is only part of what was rumored/speculated for the NX, and for $299, I liked where it was going. Assuming N is going that route, I would expect much more towards what was speculated, which would pretty much make the device in that video look like an inferior product (outside of probably screen size).