Hows it dorky? It's fundamental information sir.

VGChartz: Video Game Charts, Game Sales, Top Sellers, Game Data

Well not exactly.

PS3 at the end of it's gen had much hearts and mind share due to the high quality exclusive releases at the end of that gen. Where as 360 near the end was forgotten from MS with exclusives. Along with sour taste in peoples mouths with the RLOD on 360.

Then yes MS with it's $100 more DRM in place, gotta have Kinetic for it to work lie. Did not help.

Plus Sony showing the roadmap of Exclusive games coming within the next 3 years plus deals with 3rd party AAA games DLC first to PS4.

And now 3 years later with all the P4 Exclusive games coming out with all the mind share and installed base, it's just a snowball effect till at least next gen if not longer as long as Sony does not fumble the ball to PS5 in 2020.

Yeah and no, the PS2 DVD thing comes always up in combination with Japan + Dreamcast.  https://youtu.be/e27kjhZXQqE?t=21s

Maybe you are trying to say now that your OP was sarcasm and I get that. Innovation such as CD drive, DVD drive or Blu-ray or even cartridge isn't fad. It's experiment with Technology. Using different times of medium to can have different cost and different perks. Sony sold CD/DVD/Blu-ray players separately as well. Those wouldn't be fads either. Just gains in Technology. It seems as though the next gains if you call them that would be Digital Distribution. A fad is a fidget spinner, a yoyo, or bell bottoms. Some come back. Others don't. But CD players don't come back at all. They're obsolete in the entertainment and technology industry.

I think the PS4 is selling so well because it’s a powerful system for a great price.

To say there's a complete lack of competition is overstating the reality of the situation. Xbox is the current weak link, and they're doing well enough. I'm REALLY interested to see if the Switch can maintain it's momentum, if for no other reason than it's sales potential has been such a massively contentious topic on this site. I do agree that Sony has made the best moves this gen. It's almost impossible to argue that point.

With full BC poised to become the norm in the next round, and digital purchases being bigger than ever, this gen will see a "carry over" effect that's stronger than it's ever been in past generations. Building a customer base has never been more important than it is now, especially for Sony and MS. It would take a monumental series of fuck ups for a gamer to abandon their favorite ecosystem at this point. Nintendo is not exempt of course, but they do exist in a slightly different space. Still competitors, but they are more apt to be paired with a Sony or MS console, as opposed to somebody buying an Xbox and Playstation combo. MS REALLY fucked up more than anybody else. I don't see how they ever get back to XB360 numbers, which, make no mistake, were somewhat padded due to it's high failure rate, and subsequently higher than normal levels of recurrent purchases.

i think it was somthing from all, good price point from the start (sony learned from ps3), really good first party games, good third party deals

Games sell consoles, not a fad.

The NES.  Going by market share it actually sold even better than PS4 (90% market share in peak years).  All it did is play games.  Also every Nintendo handheld is basically the same story.