That's an interesting take. I didn't know that the tool screen even existed, so I had no idea that it would be nice to have in my toolbelt for future needs. A README also helps those that may already know a lot about screen and want to know the differences between screen and their implementation.
There is nothing better in open source than a thorough, well-written README at the root of the project. Wanting others who don't understand the source of the inspiration to be completely clueless is unfriendly (at best).
I love the async closure update and the if-let scoping fix.