Web interfaces are cool because they allow one to easily experiment with new takes on common practices. The easiest example is of course GMail – Google’s email client. They have tons of neat features which are were never available for “standard” mail user agents.
But what’s cool about GMail isn’t the big changes – the labels, or the chat integration or even the very interesting conversation model. Its the little details that I dig – take for example this:
Now, this is cool.