i don't think the language is what matters most when talking about technology. The platform is the important thing. When coding on iOS or Android, learning Objective-C or Java isn't the longest thing to learn. Learning the framework objects and patterns is really what matters. Same goes for HTML5, node, Ruby on Rails, etc... A computer language is very rarely using more than 50 language constructs (operators + keywords), which could easily be learned in less than a few days.

Haxe doesn't solve this issue i think (and nothing can).