I meant as a user. I realize that 64 bit systems can read from memory faster, and can support more accurate floating point calculations, but over the past five years I’ve followed the slow transition to 64 bits from 32 bits in both Windows and Linux. Performance changes were not very noticeable for most applications.
Eventually, when applications routinely use multi-GB memory, it makes a difference. But now, on phones, when 2 or 3 GB is the norm, I don’t think it does. That doesn’t mean that the move is a bad thing or unnecessary, just that the first to do it (iOS or Android) doesn’t get an immediate killer advantage over the other. They’ll both get there, eventually.