You'll care about them when half of your hardware no longer works and you find out that the companies that manufactured it don't make 64 bit drivers.
????
how likely is this considering I'm getting a completely new PC. if any of my hardware fails i'd just get the same hardware w/ obv would have 64 bit drivers.
tbh I've never had to replace a part on any of my machines (all 4 of them), in well...ever. Hell, my old Windows 98 still works perfectly and that rig is like, 9 years old. This one is like, 5 years old and just peachy, so idk.