There's no technologically huge breakthrough, just a suggestion that, instead of higher level abstractions, this could be handled by a simple, compatible modifi

There's no technologically huge breakthrough, just a suggestion that, instead of higher level abstractions, this could be handled by a simple, compatible modification to the existing DNS protocol. This is something that administrators already do through less elegant and less scalable methods. It's trivial to put together a list of domains, or subscribe to a list, and have them resolve differnetly.