Why not? Maybe most of us are not going to use it, but the free market of growing programming languages will have an overall positive effect by inspiring other langs, such as many features of ES6 being inspired by CoffeeScript et cetera.
I like seeing the trends of what features show up frequently in new languages. These features manage to work their way into more popular languages, either as changes to existing ones like Java or C++11 or new languages like Swift and Go.
Competition is good, competition is creativity.