Tablets and smartphones are adequately served today by 32-bit processors, but devices are increasingly dealing with more data and applications such as video, McCarron said. The storage and memory needs will only grow as applications grow more demanding, McCarron said. By keeping large chunks of data in memory, tablets with 64-bit processors could hypothetically offer faster application response time.

For example, rather than dumping applications in hibernation out of memory, current tablets keep them running in virtual memory. If the applications could be run in actual memory, their response time could be faster. It is possible to virtualize flash disks on tablets and have a chunk of the system memory mapped to the storage, which is common on all PC operating systems.

"When you're not using it, it's still resident, virtualized in the flash," McCarron said.

There is also an expectation that 64-bit on ARM will matter more with Microsoft's Windows 8, which could be released by the end of next year, analysts said. Windows 8 will be for both tablets and PCs and will work on chips based on the ARM and x86 instruction sets.