JS has some great features, but I sincerely hope we move on from JS as soon as possible. IMO, it's pretty well done its job, and it's most interesting now as a compile target (particularly with source map support!)

I'm not a fan of C++ (I'm a recovered user and abuser of C++), but I AM a fan of many things built with it, including the Unreal4 engine, which runs great when compiled to JavaScript. =)

I've been using and really enjoying CoffeeScript, which, IMO is what ES6 should have been. I also like to fiddle with Haskell, and there is a Haskell to JavaScript compiler, too.

Whatever catches fire after JS, I hope it has these features:

* Dynamic object extension + better abstractions around common prototypal OO patterns -- maybe something like built-in stamps? * Lambdas with closure * Immutability by default * Functional utility belt built-in to the core with a single API around streams, continuous data sources, and collections including arrays and objects/associative arrays/touples. This API should behave the same way regardless of whether data flows through the functions one value at a time (i.e. iterables / generators + yield), in response to emitted events (e.g. Node-style streams), and periodically sampled values (continuous data sources such as audio, electrical signals, UI inputs, even time-independent things like vector graphics, etc...). * The necessary primitives to support the above. Functor literals, promises, etc... * A better single number type for most use cases * The ability to easily define custom binary types, for implementing things like low level binary protocols more easily