Seeing as 360 did 8.0 mil, PS3 did 9.2 mil and the Wii did 19.5 mil in that time frame, my predictions are as follows:
X1 = 7.0 mil
PS4 = 10.2 mil
WiiU = 9.5 mil
My reasoning? With all of the negative press, X1 will lose 1.0 mil to PS4. I know that pre-orders in the US for software seem to indicate a 2:1 split (Call of Duty: Ghosts, which would generally be favored on Xbox, is currently tracking at 31.8k for PS4 and 17.5k for X1), but I think this will change as people forget about E3 and MS gears up its marketing machine.
I also think the WiiU will do half the amount the Wii did.
3DS = 55 mil
Vita = 10 mil
If Sony pushes the Vita as a second screen for the PS4, sales may improve, but right now I am assuming they will not.
I don't think the 3DS will be as high as people think, because more people will be playing on phones / iPods than before.