Will Dart become the de facto programming language with web developers?

Google has unveiled a new web programming language that may unseat Javascript as the top web development programming language. A leaked email from Mark Miller of Google Research states "The goal ... is ultimately to replace Javascript  as the lingua franca of web development on the open web."

This may be hard to believe for many web developers. Javascript is suitable for the needs of most web developers for frontend work. Certainly if you push a language to it's limits you will see it's flaws, and perhaps that is the bet that Google is placing on Dart vs. Javascript and the future of the Internet. It should be noted that Google is not placing all it's chips on Dart--it is still invested in the evolution of Javascript--perhaps hedging it's bets.