C++ tooling is behind its time (CMake, no dependency management) and JS approach seems kludgy right now.
Java was pretty close (JDK .. or NetBeans, support packaging to Windows or Mac AppStore) but the UI component for OSX is not pleasing and would be nice if it can produce something for Ubuntu/Redhat at least (don't care Arch or the rest at the moment).
Basically I want something better than what Oracle Java has to offer today :)
PS: I would require a great IDE, unit-testing/automation-testing, good scriptable build (Maven/Gradle style, not Ant/NAnt/MSBuild).