Thank you for the explanation. Some of those I've known about (but they didn't come to mind in my original comment), and some are definitely things that I would've taken for granted (coming from a native application programming background). Those are all features added to web standards and implemented in browsers though, right?
They're all in web standards. Browser support varies but is generally pretty good for most of them.
They're taken for granted in native application programming, yes, but the big advantage of browsers is the zero-cost, on-demand install. This is a bit less of an advantage than it was in 2003 (where new Windows & Flash security vulnerabilities were discovered almost every day, and nobody dared install software less their computer be pwned), but there are still many applications where getting a user to install an app is a non-starter.
