It certainly does look good for books and for LaTeX documents though. For the Web the problem is that it requires learning several new CSS properties and learn about some typesetting issues ("rivers" and "ladders").
The following does definitely look very good to me:
https://generatedcontent.org/post/44751461516/finer-grained-...
We're 25 years in, at some point browsers have to get a proper hyphenation and justification algorithm. With a proper H & J algo and high DPI screen, I don't see why it couldn't look great.