I love the appearance of it, but there are very few cases where sharing un-copyable blocks of code is actually what you want.
Let's say you're making a programming tutorial, or you're publishing an open source library and want to provide a website with code examples. Appearance is important, of course, but your audience will want to copy/paste your examples.
I feel like this should be a CSS generator for styling the <code> or <pre> tag. If you really want to have a built-in screenshot exporter as well, I suppose that's fine too!