while i think calling current gen. systems next gen. systems makes as much sense as calling you console '360' it most likely has some connection to trying to distinguish between the '3' and the other consoles we have.
other wise current generation would include:
Xbox360, Wii, DS, PSP, PC, GBA micro, Playstation2, and Playstation3.
Because the ps2 is still a viable option when purchasing a console, when by most standards it is last gen.