@Adrian Wainer: Yes, I really didn't think about it that way.
Although my point was, as
Brink said, that there's more to the 64 bits than just more RAM. Wich is actually the topic's title...
And yes, time will pass until true 64bits applications are seen extracting juice from our super-multi-stuff-something-64-processors.... Maybe once 128bits processing is around for PC's and alike? And then... a new topic will appear! "128 bits: More than just cookies". Hehehehe