The idea of Web 3.0 has been disappointing for Elon Musk and he has referred to it as BS. The reasons are unclear but might be soon unveiled.
TL;DR Breakdown.
Web 2.0 has ensured that the informational needs are fulfilled and has also opened ways for education, finance, banking, health, and other domains. As all these are integrated into a new space, we have the opportunity to see the evolution of the web.