obviously...i mean, who would want their game to play like one of the best franchises of the past decade right?
Uncharted isn't popular because of its gameplay. It's a pretty typical and unambitious third-person shooter with light platforming elements.
Nobody cared about the series until Uncharted 2, and that's not because Uncharted 2 completely revolutionized the gameplay of the first game, but because it took pretty much the same gameplay and put it into crazy situations like a collapsing building and a derailing train.
If Uncharted 2 had the exact same gameplay but lacked those impressive setpieces, the series would probably be in the same boat as Resistance and Killzone.
Anyway, it's interesting that they're just straight up saying, "It plays like Uncharted." Have they done this before? With Dead Space, did they advertise the fact that it was pretty much just Resident Evil 4 in space? With Dante's Inferno, did they advertise the fact that it was pretty much just a reskinned God of War?