Just because some of the laws of physics are different doesn't mean they aren't laws. What does technology look like in a fantasy universe? How has this been explored in speculative fiction, and how might it be explored? How many elements of magic, (e.g. teleportation, FTL travel) can be included in hard SF before it becomes fantasy? Some classic noteworthy interplay exists in Ringworld (Niven), Operation Chaos (Anderson), and Darkover (Bradley).