I think what are we starting to see is, a lot of people bought 2 or the 3 home consoles past gen. The people who started with Wii then bought a x360 and/or PS3, and the people who bought a x360 then bought a ps3 or viceversa.
It seems, that maybe this gen, the people who spent 300-400-500$ in a tablet and/or mobiles just want one home console this time, and it seems the choice is PS4. It's not that there are less players this time, just they're interested in less platforms or just one.
So this seems more and more like 6th gen. PS4 will sell very well, probably ps2 levels, or almost at least, and WiiU and XBox One will be like Gamecube and Xbox.