I tend to agree with the statement of Sony and MS get 90% the same games and the exclusives is what sell you on the console but if Nintendo was mixed in this group and got everything the other 2 got plus their exclusives as well then it would be too big of a power house for the other 2 to compete because lets be honest if Nintendo got their act together with their online system and rivaled XBL/PSN,had around the same power as its rivals,got every mult 3rd Party game and somehow bought in fans from the core it would be the PS2 era all over again. Warning! This and the next part are very big parts of assuming!
Lets me give an example!
Nintendo
Mario 8 to 10 million
Smash Bros 8 to 10 Million
Mario Kart 8 to 10 million
LOZ 4 to 6 million
Donkey Kong 4 to 6 million
Animal Crossing 3 to 5 million (console version)
Kirby 2 to 3 million
Metroid 2 to 3 million
Mario Party 2 to 3 million
Pokemon 2 to 3 million
Sony
Gran Turismo 6 to 8 million
Uncharted 3 to 5 million
Metal Gear Solid 2 to 4 million
God of War 3 to 5 million
LBP 2 to 3 million
Killzone 1 to 2 million
Ratchet & Clank 0 to 1 million
inFamous 0 to 1 million
Microsoft
Halo 8 to 10 million
Gears 3 to 5 million
Kinect Sports 3 to 5 million
Fable 2 to 3 million
Forza 3 to 5 million
Left4Dead 2 to 4 million
Now heres a list of a few big name 3rd Party games and what they tend to sell
3rd Party
GTA 4 to 6 million
Mass Effect 2 to 4 million
Final Fantasy 2 to 3 million
COD 4 to 6 million
Battlefield 3 to 4 million
Madden 1 to 2 million
Resident Evil 1 to 2 million
Elder Scrolls 3 to 4 million
Assassin's Creed 3 to 5 million
As we can see Nintendo has a far bigger lineup as far as sales go and if somehow they could tap into that 3rd Party market and grab some sales it would be be very hard for Sony to outdo them with their 1st Party lineup and impossible for Microsoft if they lost some of their 3rd Party sales to a Nintendo console. ( i not putting down any of the consoles nor am i a Nintendo fanboy i just see an untapped market that Nintendo cant seem to get into and more then liky never will,btw the sales figures are just numbers i see here on VGchartz so if some are alittle low or high dont rag on me about it plx :D)