Why do people keep saying this? The game is available on the 360 and uses the same servers.
It's a cross gen game.
Saying resolution doesn't matter is as ridiculous as saying a smooth frame rate, textures, lighting, anti aliasing or particle effects don't matter.
"Next-Gen Visual Effects on Xbox 360 and PS3"
This defies logic.
If the Xbox One is more expensive than the PS4 in Japan it has no chance. If they want to compete the Xbox One would have to be the equivalent of $299 not $499 and even still it would probably get outsold since the PS3 outsold the 360 by a heavy margin with a bigger price gap.