Yeah semis have always been the primary target here.
As to long term NKLA hasn't been shy that they are still a ways off from getting the trucks into production, much less making a profit on them (they seem to be willing to subsidize the cost somewhat for their customers on the first deliveries using essentially the solar sales model of delivering them a full service solution at the same cost they're paying now).
I think had this thing not gone on a huge hype run people would be much more willing to look at this thing as the speculative, long term investment that it is. It's pretty bizarre to see a company being completely upfront that these things are 3+ years away from being on American roads and seeing people react to it with daily questions like "HOW COME I HAVENT' SEEN ONE ON THE ROAD" and "WHERE ARE THE JD POWER OFFICIAL BRAKE TESTS"? (not from you, just the kind of stuff that's circulating out there).
If this were a typical quiet speculative company 3 years away from putting out a product no one would be asking those kind of questions. People got caught up in the hype and jumped 5 steps ahead.