Exactly. But, don't forget the marketing that wants to to buy newer stuff as sales decrease on models that were in production for a bit. I remember when I was young, car companies would change models every darn year as long as the market would continue to support them and people would trade cars every other year and some every year just to stay up with the Jones.
It is a bit different with cameras because SOME photographers DO need all the pixels they can get. But for the common amateur and pro (portraits, weddings etc) that are printing to 16x20 or 20x24, most of today's cameras can handle the job. But we get caught with the Jones' and keep wanting more and more, forgetting the goal which is the image. A 50 Mp picture of a shoe will show the same shoe as the one taken with a 12 Mp. And a badly composed pic will look bad with either cams.
So, as much fun as it is to dream and feed our "wants", let's not forget that most of us might have all their "needs" fulfilled.
Happy shooting using the camera you already have until you really NEED more.