For reference, last gen:

Wii: 153 games with 1,000,000+ sales

PS3: 206 games with 1,000,000+ sales

X360: 207 games with 1,000,000+ sales

DS: 135 games with 1,000,000+ sales

PSP: 56 games with 1,000,000+ sales

I think each console (including the PS4) will have less million sellers than their predecessors. I think this mainly because of how game development is more expensive now than ever and other reasons. Currently the PS4 has 8, Wii U has 7, XOne has 6, the 3DS has 28 and the PSVita has 1.

Wii U; 50
PS4 ; 90
3ds: 80
X1 :60.
Vita : 10.

That's what I think at least.

That's a very good question! I'll say
PS4: 120
X1: 95
Wii U: 50
3DS: 65
Vita: 10

PS4 - 300
XBO - 140
WiiU - 50

I think PS4 is going to pick up a lot of million sellers as it continues to extend its lead on the competition. So far it looks like a good portion of 360's crowd that buys a lot of games has moved over to PS4. This will allow PS4 to make a lot of million sellers out of games that were split with 700 or 800k a piece on last gen consoles.

One thing that may hurt the results on this site is the growth of digital games. I think as the generation moves forward, game sales will trend more and more towards digital.

PS4-95
XB1-75
Wii U-65

3DS-100
PSV-6

I'm going take a wild guess and say:

WiiU:55

X1: 150

PS4:210

3DS:105

Vita:10

PS4 seems to be the third parties house right now! So i can see a lot of 1 million sellers on it.Plus all the exclusives will cross the million milestone.