But, Microsoft couldn't be content with making minor improvements (it's not as if Windows 95's UI was perfect -- the Mac's was better). Instead, they had to, for instance, push the unsuitable browser UI into the main desktop UI as part of their desire to kill Netscape (Windows 98). Folders on the Windows 7 desktop are much harder to see than they were in Windows 95.
I haven't used 8, but it's hard enough to not be annoyed by 7. I really miss the elegance of 95, even though the Start menu has never been particularly elegant.