Futhark is of interest as a future direction, chiefly as a supplementary language for sub-pieces of a larger, performance-intensive program. Note that its creators, however, explicitly state:

Futhark is not intended to replace existing general-purpose languages. The intended use case is that Futhark is only used for relatively small but compute-intensive parts of an application.

This is not a negative point, incidentally! I personally use a lot of languages in my work because I find it's better to use a tool honed to near-perfection for a particular use case than it is to employ another tool that does something not quite the same with lower quality. I wish more programmers learned more tools so they stopped doing the programming equivalent of hammering nails with a large wrench.