The Last of Us thus far sold 3.4 million in three weeks. Gears of War 1 sold over 3 million in 10 weeks. In a year it sold close to 6 million. I'd say by now TLOU has probably sold that amount.
Hell Littlebigplanet 1 as of 2010 sold 4.5 million. LBP series sold 8.5 million thus far counting three games only(LBP1 LBP PSP and LBP 2.)
I say this to say people are overlooking the sales of individual games on Sony's platform. That's not bad at all imo.
http://kotaku.com/theres-a-50-50-shot-the-last-of-us-gets-another-game-1528590301
It's pretty obvious to see that Microsoft is putting all it's bets on the titanfall horse but that may not win the race. That horse has obstacles in it's path($500 system, it's available on 360 and PC, PS4 cheaper).
Ill always ride with Xbox. Its just my preference. But i cant deny they been fukkin up. it burns my soul slow