[kibwen]

async/await has been on the 2018 roadmap from the start: https://blog.rust-lang.org/2018/03/12/roadmap.html

As for non-lexical lifetimes, there's lots that's been implemented but much of it is still experimental; follow Niko Matsakis' blog series at http://smallcultfollowing.com/babysteps/blog/2018/04/27/an-a... to stay up to date with what's happening.