Your reasons for the PS4 winning this generation despite being the most powerful console.

[Burning Typhoon]

4 PAGES AND NOT A SINGLE MENTION OF THE SUPER NINTENDO? I don't even like Nintendo. I still collect Sega Genesis games to this day.

Super Nintendo (and I wish it hadn't) outsold the sega genesis. It's DIRECT competition.

PS3 also OUTSOLD the 360. Forget the Wii, it wasn't the PS3's direct competition. It sold to old people, and compared to the PS3 and 360, had a very low attachment rate, and a lot of shovelware. So, I don't care what you want to say about the Wii outselling the PS3 & 360, the fact is that it was being sold to a different branch of people.
Low attachment rates.
Lots of shovelware.
Did not receive HD quality content, and many 3rd party multi-platform releases skipped the Wii entirely.

With that said. The PS3 outsold the 360 for first place in terms of HD consoles. (Wii had no competition as far as I'm concerned, it was doing it's own thing, and obviously, with the Wii U, the Wii sold to a market that could only be tapped once in a very long while, if ever again.)

So, now, the PS4 is doing what every Playstation has always done. Outsell it's direct competition. But, the PS3 didn't do as well as the other consoles did, but it still did it.

As some have said, price has some to do with it. But, wasn't the SNES more expensive than a Genesis? Price plays a big part, but not entirely. Still need games. Better games, and lots of 'em.