Aside from the almost completed features in the pipeline, I only see procedural macros (macros 2.0) and whatever happens to make async code easier to write[1] really impacting day-to-day code for most people.
[1] I'd really like to see F# Computation Expressions instead of async/await. I know the language experts have said Haskell-like do notation doesn't work in Rust but I'm not sure if the F# tweaks would make it work or not.