It is a Sci Fi. I saw it as a parable about couple life , marriage, interests separing the husband by his wife . And, sure, about comunication. All in the veil of provocative Sci Fi reminding, in some measure, Solaris or a presumed episode of Twinlight Zone.
A couple in the car on isolated contry way. At horizon, something easy to define as asteroids . But the consequence, introduced by man speech before the event , familiar from other movies, is real provocking. In same car, comunicated only by phone for lady , invisible one for other, the couple. But is this the reality ? A car crash can offer answer . In this case, only the suggestion.
In short, well acted, fair crafted atmosphere.