enrageorange on 12 December 2011
Two options. The 360 stays relatively popular in the United States/England even after the nextbox comes out and the ps3 never passes it.
or 360 sales slow down rapidly and ps3 passes it two years after next gen starts thanks to strong sales in developing countries despite the ps4 being released.
I think all the next gen consoles are going to initially be $350+, so there will still be a big market for sub $200 consoles in the United States and Europe. So the 360 should be able to keep up relatively well with the PS3 for at least a few years after next gen begins.
