I think it's more about developer adoption. Non-chrome browsers will not even bother with the DartVM until there is critical mass of developers using Dart to m

I think it's more about developer adoption. Non-chrome browsers will not even bother with the DartVM until there is critical mass of developers using Dart to make the transition worth it. I think the only other way Dart would take over is if Javascript languished, but that is unlikely to happen any time soon.