URLs are UI
I made a little project taking this idea to an extreme. The idea was, that you should be able to generate "meme" image macros simply by typing a URL. That way you could create memes on the fly anywhere that you can enter a URL (Slack/Twitter/Facebook/etc.) without having to leave the app. Just type a URL of the form:  http://urlme.me///.

http://urlme.me/