The most succesful language of web

A while ago, i have claimed that javascript was the most successful ubiquitous language of web.
It seems that the fourth edition of ECMA-Scriptwill make sure it stays like that for the foreseeable future.

Here are some highlights of the upcoming version. (From Wikipedia)

• Classes
• Packages and namespaces
• Optional static typing
• Generators and iterators
• Destructuring assignment (likely)
• JSON Encoding/Decoding

I don't see Javascript as a threat to Java language or JVM platform, in fact both languages can collaborate happily if the need arises. In fact thats why Javascript was written in the first place.