Why one more new language?
Google is developing a cloud based IDE for Dart which possibly be the first Dart application would attract the crowd to jump in to the language.
Is it time for me to learn Dart?
Dart is already getting some traction..! Someone made a Dart to JVM bytecode converter called jdart which takes a Dart file as input and creates a .jar file. It is limited in features but who knows what comes up next..! So gear up now and start with Dart.