Not really, it's more like "Oh my god we don't have to use Java any more". I don't think it is particularly loved on it's own, it's just much better than Java.

Swift is similar in that iOS developers don't have to use Objective C any more, but actually looks like a nice language in its own right.

I think although Kotlin is going to be an improvement for Android development, it's not going to change much unless Google drastically simplify the actual Android API. You're still going to have to deal with this shit: https://github.com/xxv/android-lifecycle

More like coffeescript for Java