Excluding accessories and the DS series, it's really only been the Wii and Wii U that offered unique gimmicks that couldn't be done elsewhere.
That's not the point of my post. Too much word parsing going on again. I can take out the example and the sentiment stands on its own.
With that said, re: Nintendo you are wrong. It's not about "doing something that can't be done by anybody else". It's about dancing to the beat of one's own drum which Nintendo, for better and for worse has done since the days of NES -- - how many times have we have heard Nintendo is doomed - and yet still continues to thrive.