I've never built a web application of any description. As a user, what are the improvements that I should be looking for that have been introduced over the past 10 years? It was longer ago than that that AJAX started getting big, and as far as I can tell, that was really the last key innovation for most apps: Being able to asynchronously load data and modify the DOM when it becomes available. I'm aware of other things like video tags, webgl, canvas, and such that allow us to replace Flash for a security win, but that seems replacing a past technology just to get feature parity with what we had a decade ago.
Everything else seems like stuff that makes things better for the developers but not much visible benefit to the user. I can understand where a comment about the web not being much better would come from, on the scale of a decade.
Go back 20 years, and you're talking about a completely different world; frames, forms, webrings, and "Best viewed with IE 4.0". But if '96 to '06 was a series of monumental leaps, '06 to '16 looks like some tentative hops.