[throwaway2048]

larger pointers mean more ram is taken up by programs, its something that's a given with a transition from a 32bit to a 64bit architecture.

[joakleaf]

Yeah, pointers are double size, but the majority of RAM for iOS apps is used by images and other resources. These do not grow in size.

Most apps are not using tens of megabytes for pointer based graph-structures etc. or code.

They are however using loads of megabytes for image data, offscreen buffers, etc.

So I doubt that 64-bit changes much.