What's on a name?
The name World of Glass came from the final voice-over of Everwood's episode Last Looks. Here's the quote for you:
"A heart is a fragile thing. That's why we protect them so vigorously, give them away so rarely, and why it means so much when we do. Some hearts are more fragile than others, purer somehow, like crystal in a world of glass. Even the way they shatter is beautiful."