I agree. This is really just a way to start framing what we hope will be a pretty big shift. The web was built by scientists to share particle physics documents, and all browsers today look like Mosaic 1.0 with tabs added on, despite the web evolving as you said. This point isn’t lost on any of us.
There are two properties of the web that I think are pretty essential. First, every page has a URL which makes it universally accessible by many different clients. Second, the client is independent from the content, which allows it to represent user interests in a unique and interesting way.
We’re going to be religious about how to make the web maximally useful and agnostic about how to get there. Lots of testing and new experiences to ensue. The future of the web will likely be in something that looks radically different from what we have today. But there is utility in using the familiar to introduce the truly radical.