The text reads: "Urbit has to be just as usable as any widely used app in 2017. For a personal server, the usability bar can't be Unix."
Just above this, there is a screenshot of a browser displaying the following: "OK, ~ravmel-ropdyl is coming online. Ping 734ms, DNS Waiting, :talk Waiting"
...which, well, looks exactly like '70s Unix usability.
I also find it odd that Urbit wants to conquer the world, yet the design is so attached to entering ASCII sequences on a command line. This severely limits the platform's international usability. Their programming language's syntax page even proclaims "To make ASCII great again, we've mapped each punctuation glyph to a syllable": https://urbit.org/docs/hoon/syntax/#-glyphs-and-characters
The problem with using all these ASCII punctuation marks is that many of them are hard or even impossible to type on various international keyboards. It doesn't seem like non-English users were ever considered when the decision was made to "make ASCII great again".
On a more conceptual level, marrying a supposed futuristic redesign of the Internet to a 1960s character set just seems off. Today's computing increasingly happens on touchscreens, but Urbit's I/O model is happy to settle for the ancient paradigms of teletype terminal emulation and ASCII streams.
The whole thing has a weird retro-futuristic vibe to it, like it's more of an art project about a computer system that the Mad Men would have used to update their websites in some alternate reality.