Well, it's mostly a side project that has been in the making for quite some time. American Truck Simulator as a whole needs to evolve beyond the typical semi trucks and the large world of not just the US but probably into Canada or Mexico. So far, here's what we know:
So far it looks promising. But as a PC only title (and FH5 is on PC anyway) it'll be limited, at least in terms of competition. There has been talk on its forums about breaking into the console market, but it's still going to take time to see it become a reality.