I know we're getting dangerously close to "Ceci n'est pas une pipe" post-modernism art theory land here, but a screenshot of a widget isn't the widget, and how they look in a screenshot is still bereft of other context. It's not unreasonable to ask that even "purely visual/aesthetic" feedback deal with the widgets in the direct context of running in a browser, and used inside web forms.
I think that's actually supposed to be the :hover and/or :focused state (as most of the screenshots of the other controls intentionally are), which is why that specific one especially seems to tell me it needs more context.
Because you just spent time creating a blog post explaining the changes, presumably to an audience who might not be using your application but you want to entice.