It will take a long time until 64 bit programs will exist, of course that you will have Windows64 that in real life will be only 32 bits, the same story with Win3.11 and 32/16 bits. Windows only became fully 32 bits with XP. The only advantage of 64 bits is for breaking the 4 Gigs memory limit barrier, don't expect any increase in performance.

Stupidity also evolves!