I'm not trying to dump on this project, quite the opposite, I hope they achieve what I was never able to. The point I'm trying to make is that I could only defend PHP for so long before I had to admit that it's a lost cause, and other languages are simply a better fit for web development.
Stuff like this should already be part of PHP, but it's not, and I'd bet good money that it never will be. But hey, we got namespaces and late static binding, things I've used maybe once each.