Go is supposed to be a better C. Scala is supposed to be a better Java. JS is supposed to be popular. EDIT: Go is intended to be a systems-programming langua

Go is supposed to be a better C. Scala is supposed to be a better Java. JS is supposed to be popular. EDIT: Go is intended to be a systems-programming language with an emphasis not only on runtime efficiency and concurrency, but additionally on such things as compilation speed. Scala is intended to be a hybrid OO-functional language that is approachable by a broad class of mainstream programmers (i.e., Java programmers), with a type system considerably more sophisticated than Java. The emphasis is, I'd say, on a language that has long-term potential, at the cost of a somewhat problematic toolchain. JavaScript's enormous advantages are that it is universally available, easy to approach, and flexible enough to support functional techniques.