Some people are way to pessmistic here, look at the situation Infamous releases in, it's the first big post release PS4 exclusive and it's probably going to be the only one until The Order comes around (not counting Driveclub) and if it turns out well, then I can easily see it become the go to game on the PS4 for at least a couple months.
I'm pretty much willing to bet anyone that this game is going to sell over 3mil pretty easily in 2014, unless of course it turns out shitty.