Well, at the performance level, Dart VM is much much more faster than Javascript ones. I dont think Google plans to kill Javascript.
But Dart makes sense on Chromebooks for instance, where Google could deploy the Dart VM.
So the benefit is for Google ecosystem.
Front end devs are afraid of fragmentation , I think competition and choice is good. It will force JS to evolve much more faster, And why not ,maybe some day we will have a NodeDart too since Dart VM is open source, it would be awesome.
But Dart makes sense on Chromebooks for instance, where Google could deploy the Dart VM.
So the benefit is for Google ecosystem.
Front end devs are afraid of fragmentation , I think competition and choice is good. It will force JS to evolve much more faster, And why not ,maybe some day we will have a NodeDart too since Dart VM is open source, it would be awesome.