For me it's more like Vita lost the gen, 3DS won't be anywhere near DS sales levels, it will do respectable numbers, but will be a dissapointment compared to DS.
As for home consoles, yes PS4 winning would be my guess as well. Xbone will beat it by max 5 million units in NA, PS4 grabs the rest of the world, europe and Japan where Xbone is even more non-existent than the 360.
So it is happening...PS4 preorder.
Greatness Awaits!