There was an idea called the Memex in 1946 that was an inspiration for subsequent hypertext ideas. And a Belgian in the 1920s had a "steampunk" web, but it built more on the idea of inter-text referencing (like most encyclopedias use). Ted Nelson justifiably gets the credit for the term. There were a couple of distributed document with hyper-linkage ideas floating around in 1989 and 1990, so possibly Tim was just the one to put enough of it together and it would have happened within a year or two anyway, but there are certain aspects to his particular putting-it-together (the ease of writing HTML for display and content for example) that were important to the web becoming what it did, and possibly might not have happened at all without his push.