Any further explanation? I think for most people with websites, postscript would be an absolutely terrible choice: the barrier to entry is simply too high.
(Note: I think PostScript, and stack-based languages generally, can be great fun, but really not for the average “guy making a site about his dog” sort of user)
I am not as sure it would be such a horrible choice. Most people don't hand code their site and a Postscript derivative would have probably got decent support from Illustrator and the DTP crowd. It would have probably been easier for the normal user because writing software to create the pages would have been quite a bit easier. It would have spawned a lot more software instead of the user-unfriendly "use a text editor" culture we have now. Also, having an actual display model that was well understood by the creative crowd would have been pretty nice.
(Note: I think PostScript, and stack-based languages generally, can be great fun, but really not for the average “guy making a site about his dog” sort of user)