So a lot of people seem to be excited about the 64-bit client that is being tested on the PTR. I know what the difference between 32-bit and 64-bit OS is, but what is the difference between the two for clients? Anyone able to explain like I'm 5? Is this something that we should be waiting for with bated breath as multiboxers or will it not change anything for us?

In case it matters, I'm running a Core2Quad Q6600 and 6 GB of RAM on my system (Win7 64-bit).