What the hell, I'll give it a whirl I guess. Couldn't hurt..

3DS - 16,000,000

WiiU - 14,000,000

Xbox 360 - 8,000,000

PS3 - 9,000,000

PSV - 4,000,000

PSP - 3,000,000

Wii - 3,000,000

Xbox 720 - 3,000,000 (figuring a launch roughly around the same time as WiiU)

DS - 2,500,000

(Don't think PS4 will launch until 2014)

3DS - 12
PS3 - 10.5
Vita - 8.5 (It can get there, i'm sure)
X360 - 8.0
WiiU - 4.5 (Not sure about this one, but its high price can do no good)
DS - 3
PSP - 2
Wii - 3.5

3DS - 13.5m

PS3 - 9.7m

WiiU - 9.5m

360 - 8.2m

PSV - 6.1m

Wii - 3.5m

DS - 2.1m

PSP - 1.8m

I'm not very good at predicting, but this looked like fun.  I have no idea about 720/PS4 so I'm going to hold off on them.

PS3 - 10.400.000
3DS - 10.500.000
Wii U - 7.300.000
Vita - 6.500.000
360 - 8.600.000
Wii - 2.000.000
DS - 1.900.000
PSP - 1.200.000

Good predictions here, keep em coming!

3ds-15m
Psv-6m
Wiiu-11m
Ps3-10.5m (price drop to 199 will be huge alongside 5 awesome exclusives in the first 2 quarters)
Ps4-3m
360-8m
720-3m
Both ps4 and 720 will sell out

3DS- 13,500,000
WiiU- 10,400,000
PS3- 10,500,000
360- 8,000,000
Vita- 8,000,000
Wii- 2,000,000
DS- 2,000,000
PSP-1,200,000

PS4 and 720 delayed to 2014.

Wii U - 7 mil

PS3 - 9 mil

360 - 7.5 mil

Wii - 2.5 mil

3DS - 13 mil

Vita - 7.51 mil (I WILL WIN THIS BET!)

DS - 2.5 mil

PSP - 1.5 mil

Ok, I've adjusted it. I'm not very good at this.

3DS- 13,500,000

WiiU- 8,000,000

PS3- 9,800,000

360- 7,800,000

Vita- 6,000,000

720- 2,150,000

Wii- 2,000,000

DS- 1,000,000

PSP-1,500,000