Not having a better one doesn't mean this one's any good. But sure, I can try too: it's like Win98: the benefits were very much unclear when it came out. Other than the new "skin" and lots of bloat (vs Win95 on hardware from that era), the only real change seemed to be better USB support but almost nobody had USB devices yet. Yes, it also came with IE4 but you could install it on Win95. Oh, and ACPI too but too bad it never worked reliably on hardware from that era. Or AGP support built in, but Win95 OSR2 had that too -- same for DirectX 5.2.
Not by any stretch of the imagination. There's been countless worthwhile improvements over the years, like support for lots of new hardware (multi-core CPUs, USB2/3, SATA, AHCI, Blu-Ray, PCI-e, SSD, etc), new and much improved shells, ACLs, cleartype, better power saving options, being able to have multiple users logged on at once, window composing, plug and play that just works, new network stacks/filesystems/supported formats/management tools/etc, group policy, WMI to manage stuff, active directory, MUI support, new deployment tools, etc. And a 64 bit OS wasn't really that big of a deal at first. You have it completely backwards IMHO.
Much like Win98's benefits weren't exactly clear at the time. But now, with dirt cheap RAM, video cards with loads of memory, tons of apps with a 64 bit version (and even some without a 32 bit version) that can both use more RAM when required and also get extra speed from the extra CPU registers... it's a pretty obvious choice in most cases.
That's actually assuming he meant x64 in the first place. He was talking about a 64 bit OS. Win NT 3.1 had a 64 bit version back in 1993 for the Alpha architecture. Being 64 bit i.e. the data bus width by itself is no big deal (at all, really). The main advantage of x64 is rather being able to address more RAM (which is not what "64 bit" refers to either -- we only have 48 address lines which limits the address space to a mere 256TB). So yeah, back in 2005 when 4GB RAM costed quite a lot and that the technology wasn't so mature nor compatible it was very much pointless (if not just a cause of undue problems). But fast forward 5 to 7 years, with RAM becoming dirt cheap, video cards having 512MB+ of RAM and x64 software being readily available... The big picture changed significantly since 2005.