This, the Switch isnt selling on motion controls. 

Game Boy, Game Boy Advance, DS, 3DS, Wii, XBOX 360, PS2 all sold this well without a fad.

So... we just gonna act like 1 2 Switch isn't a thing?

Look, what you mean to say is that MARKETING THE CONSOLE AS A MOTION CONTROLLED VIDEO GAME MACHINE was a fad. But motion controls are still in gaming today and that cannot be ignored because of the current trend on its marketing. I mean, I was just playing Resident Evil with motion controls not 20 minutes ago. And all consoles on the market have motion controls to some capacity which means, motion controls are not a fad. The marketing for motion controls are a fad, however.

Motion controls are the core of all VR gameplay. Motion + AR/VR is the future of digital interaction. After experiencing the freedom of playing in AR/VR with motion contorls, going back to the restrictions of traditional displays and controls is claustrophobic.

Eye Toy (AR), Wii Mote (Motion Controls/Gestures + Buttons), Kinect (AR, Stereoscopic Tracking + Voice Commands), Move (Motion + Buttons + AR), and 3D TV (3D) were all building blocks to next generation gaming (the real next gen, not just console to console generations, an actual shift in game design and development). They are no more of a fad than stuff like Pong, Atari, or the Arcades. 

VR, however, is not a core component of gaming. While motion controls are the core of all VR gameplay, VR gameplay is still widely niche.

As others, I would not consider motion controls a fad, but a game changer for the Nintendo.  The Wii did it well, then Nintendo stepped away from it with the Wii U (didn't come with it's own motion controllers, so treated as a second class option) and tanked, and now the switch is doing well (although it could be debated the hybrid has more to do with that than the motion controls, but I think they are both key)...  basically, IMO, motion controls is not a fad but a core component now.

DVD also was not a fad in the true sense, but you could say it is in terms of boosting sales for a console...  as that only really applies to early years of PS2...  after that, there are far better options for the a DVD player...

PS1 sales were hot too (compare to previous gen), and I think PS1 and PS2 both sold well because of their library.  PS3's library was not that great compared to others (not saying it was bad), but the Cell processor really crippled development for it and the library suffered.

I do agree that the best thing that PS4 has going for it is it's exclusives / library without any sort of major hardware advantages over the alternatives.  

UMMM playstation consoles were never a fad. they sold because they made the right moves, not to mention, the had most third party games as exclusives, if this was the case now ps4 would be selling much better. motions controls yes they are fad, sure they still exist but they can't even sell 5 million consoles now, not like with kinect and wii.

Nintendo plans to sell 14 million units of the switch with motion controls in it's first year (March 2017 to March 2018).  I am seeing it as core for Nintendo.  They didn't make it core to the Wii U, and how well did that do...

True, AR/VR is still a niche market in the AAA space, but it is growing, and will very likely be the standard once next gen gaming platforms arrive. Motion controls will be at the heart of gameplay in almost all games in the near future, so motion is and was far from a fad.

motion controls is not whats selling the switch. its selling a little better then 3ds because, its actually a handheld with descent tech, and its also nintendo next home console. with a very strong library of games