This is totally from a marketing stand point. With any new developement, there are always three phases -- the early adopters, the main streamers and the late adopters. Just look at how many years we have had computers and how many people still don't have computers in their home -- these are the late adopters. The early adopters are those that jump on the bandwagon as soon as something is available. The rest of us are the main streamers. Time and time agian, this has been proven -- how many people actually have high definition TV? So it will be the case with 64bit computing. There will be those people that will run out and buy one as soon as it is released. Then once the chip and the MoBo is done, the software developers have to follow. After the Chip, MoBo and software are all there, then people will start considering to buy. All these will take several years. Then, there are people who still will not buy because their current system suits them just fine and no developer will be stupid enough to rule out a whole segment of the market completely so we're going to see 32/64bit compatible software for a while. I would say, all in all, you'll have at least 3 to 4 years (or longer) with your current laptop before ever you'll have to consider 64bit. Just my $0.02.
MARQUISDARQUIS beat me to it.