I really don't think so. It might not be as mature as one might want in production, but from what I can tell, it certainly fulfills the title's assertion in enough useful contexts to be accurate.
What do you think would be a better title? I read "web apps" I think html, css, and js. I wasn't expecting (nor would I want to) to ship Python to the browser.
That might be what's being lost in translation here. Python is the development language. If we're to analogize, HTML/JS/CSS would be the runtime stack. Perhaps this is what's lost on mruniverse