I'm an idiot, you're right. There, it's on record. I claim under-caffeination. Still, the basic point still stands, even if my numbers need to be divided by 8. Desktops use more memory because, as users, we demand fancy true-color graphics, high resolutions, and anti-aliasing that we didn't have in the Windows 9x era.

(To prevent further confusion, I think you have a unit typo -- the final result should be 8100 kiB or 7.9 MiB)