with a ten million console install base? nope. Probably the PS4 will have a 20 million install base when Uncharted 4 launches, so I guess it can do 4 million in the first year, with some luck. 6 million lifetime.
Halo 3 launched when 360 had a smaller userbase than original Xbox and it still managed to outsell eery other Halo. GOW3 launched on a console with a much smaller userbase than PS2 and it still became the best selling GOW title. The first next gen installment of a core franchise is always the most popular one in the franchise, there is absolutely no reason to believe UC4 wont be the same.
To suggest UC4 will only sell 6M when both UC2 and UC3 sold around 7M is nothing short of ridiculous