There's been some discussion of making things like a virtual scroller available under an "std" global namespace [0], and the Chrome/Edge teams recently did a refresh of just the visual appearance of the standard built-in HTML inputs [1] (which, frankly, I think look even worse now).

Beyond that, nothing meaningful is happening. Even the input types defined as part of the HTML5 spec are still barely supported [2], and if browsers can't manage to implement decent date/time/range/color inputs, there's no way of getting more complex components designed and standardized.

Of course, the other aspect of that is, anything that is part of the web API is there forever, which means bugs and mistakes aren't really fixable. So, there's some benefits to having a purely community-driven ecosystem instead.

[0] https://github.com/WICG/virtual-scroller

[1] https://blogs.windows.com/msedgedev/2019/10/15/form-controls...

[2] https://www.smashingmagazine.com/2019/01/html5-input-types/