We would have ended in some huge JAVA EE circa 2004 mess, with XML to spare and perhaps RDF and a couple ad-hoc languages thrown in for good measure.
In HTML 5, one is abandoned to the CSS tricks and JavaScript hacks to make visual UI components of HTML tags.
Every time I get a consultant gig outside the web world, I rejoice.
Yet I've spend a big part of my career involved in web development.