Is ps3 minecraft ever going to be unlimited world?

I mean, it kinda ruins it for me knowing that i can only explore a maps worth of world, are they ever gonna either make the worlds bigger or make them unlimited or are they keeping it like how it is forever?

Probably not. Even on PC, Minecraft is not actually an infinite world, though it is mind-bogglingly large. However, this requires quite intensive use of system resources. The reason the console releases are so comparatively limited is because if they weren't, Minecraft would make them slow until they locked up entirely after travelling a certain distance.