[pcwalton]

Compared to C, Rust has generics, closures, a module system, hygienic macros, real strings, slices, lifetimes, and the borrow checker. But note that all the features that Rust adds over C are, in my view, one of (a) necessary for memory safety (which is an important feature in 2015); (b) improvements on C features (macros compared to cpp, strings compared to char *, modules compared to #include); (c) things you expect from a modern language (generics, closures).