That “levitation” video is worthless: One edge of it is still resting on the magnet, and plain old steel screws will do that if you put them on a plain old speaker magnet. If they can’t even manage to show actual levitation after claiming it, then I highly suspect the rest of the claims are just as invalid.
A lot of people did use it on home computers (myself included) but the target was still businesses. XP had TV ads and colorful themes, and all that, while Windows 2000… Didn’t. (Well maybe on C-SPAN or something) And the most basic (major) edition was “Professional” instead of something like “Home” as XP had.
I wouldn’t be surprised if some of the big box computer makers did ship with it to home users, but it wasn’t “meant” for them.
Different kernel. 95 was still DOS based. I believe a significant amount of stuff (especially drivers of course) which worked on one side didn’t work on the other.
XP was the “merger” - the first NT based system for the consumer market.