It will take its well-deserved place in the range of many other languages available instead of being offered way too often as the only language worth learning here on HN. I hope the JS-madness will calm down in next few years as well. Would be helpful to get some other languages in browser. Maybe Dart/NaCl will help.
There is always hype; the reason the "hype cycle" is an identifiable thing is that it repeats over and over again. And once the hype and the disillusionment die down, that's when you end up with a useful language.
(I say, as I work in Scala. But I think it's slightly different from your other examples; it's been around much longer than the other three languages you mention.)