So says Qualcomm. They (and others) are always highlighting the memory addressability when talking about the A7. A 32-bit processor would be able to address 2^32 or 4 gigabytes of memory. A 64-bit processor would be able to address 2^64 or 4 exbibytes. At this point, exbibytes is not really relevant smartphone or not. The more important things are the datapaths and register sizes. A 64-bit datapath can carry twice the data a 32-bit datapath can. A 64-bit register can process twice the data a 32-bin register can. Of course software needs to take advantage of it. But iOS 7 is 64-bit and Apple has provided the tools to rebuild to 64-bit. And then they go on and admit that they’re also working on a 64-bit processor. Now who is pulling a marketing gimmick?