No it won't be. Some of the high-end phones already have 2 GB, and next year it seems they'll have 3 GB of RAM. So 64 bit is arriving just on time in 2014 (although Cortex A15 supports extension to 40 bit, but using that may be a bit messy):

http://www.phonearena.com/news/Sonys-2013-flagships-tipped-Q...