I've noticed a lot of people seem to think that this gen will peak early because of the explosive start and limited growth YOY for the market leader (PS4). But one thing I couldn't help but notice is that we haven't even recieved our first AAA UE4 games yet. We're likely years away from a true next gen GTA, we've not had that exclusive Call of Duty or any other exclusive of that popularity and so in a number ways it almost feels like this gen is tracking behind last content wise.
The way I see it this gen got off to such a fast start because of hype and ease of accessibility (lots of games, lots of familiar franchises from day one, no crazy hardware prices or need/feel to update TV, games are more popular now then in 2006). The hype is dying now hence PS4 being down, so it will become more dependant on the content and the exclusive content has yet to arrive in abundance. Once that happens though, sales will rocket.
I don't expect the systems to peak till 2016 (X1), 2017 (PS4).
What about you?