As discussed in Chapter 1, Blockchain 101, in order to fully benefit from decentralized platforms, it is desirable that you decentralize the storage and communication layer too in addition to decentralized state/computation (blockchain).
Traditionally, the web content is served via centralized servers, but that part can also be decentralized using distributed filesystems.
The HTML content shown in the earlier examples can be stored on a distributed and decentralized IPFS network in order to achieve enhanced decentralization.