The crop of JavaScript derivatives are probably not going to disappear, but riddle me this: while there are many variations on JavaScript's syntax, why do other languages that are arguably JavaScript competitors, like Ruby and Python, not have the same wide selection of alternate syntaxes and sugar packets? Could it have something to do with the usability of the default dialect?

I personally think it's a bad sign when so many people feel they need to write a transpiler to add some syntactic and behavioral enhancements. The language should provide a functional, livable set by default, at least good enough that writing a transpiler doesn't sound like the time-effective solution.

I don't understand ASM.js very well but it sounds like it's a new type of bytecode that allows programs written in many different languages to be executed in the browsers' JavaScript VM. If this truly bring us first-class support for non-JavaScripts (which won't be real until browser vendors either ship or make it transparent and automatic to install additional DOM bindings), I will be so happy. I will also be curious to see if it has any impact on the popular use of JavaScript itself -- the node buzz already kind of seems to be fizzling out and moving onto things like Go, so maybe we won't have to wait too long.