I learned logic design in a class where we wired up 74LS TTL, a couple of years before they switched to programmable logic, so my knowledge of this sort of thing comes from looking over the shoulders of folks who actually do it, but it seems really cool. In particular, I love the idea that you can shoehorn all sorts of temporal constraints into a type system.

I fear that progress in this field might be handicapped by the fact that the folks who know a lot of type theory have little idea of how hardware works, and rarely care, and most of the folks who know how hardware works don't know a lot about types beyond possible bad experiences with VHDL. Luckily there's a non-zero set of people in the overlap, though.