I don't think it matters. All that should matter is how good you are at it.
I'm sure there'll be plenty of people who would say if you look at the keys then you aren't as talented as someone who doesn't even if you actually play better than them.
Don't get me wrong, I'm not saying that not looking at the keys isn't a talent above just being able to play, but I don't think that should make or break you.
I would recommend learning to not have to look at the keys, as I would guess that it would help you learn it better, which could definitely lead to being a better piano player.
Really, your fingers/hands will probably be moving fast enough that if you're playing it correctly even looking at the keys isn't necessarily going to help you (of course if you're playing a really slow song then perhaps). I mean think of when you're typing on a computer keyboard. If you look at the keys you're probably going to be slower if you're looking at them to be able to know what one to press.
Also, for some reason I'm reminded of the piano quest from the first Resident Evil game.