Respect your opinion, but Storm is not exciting? Hadoop? Solr? GWT? Android? Saying Scala or Clojure (or java) are not used for exciting tasks is dismissing all these projects as non exciting, which I have to disagree
Although, Android did some diversification for Java programmers, right.
Emscripten - C++ -> JS, that's exciting, compared to Java -> JS
> Solr
Who cares about technology behind Solr? You didn't even mention Lucene