The New Jersey case for US sports betting reform is heading to the US Supreme Court, and the imaginations of many are running wild. Namely, the prospect of the state winning its appeal to allow sports betting also offers the possibility that a number of other states could quickly move to legalize sports wagering. (Some already are well on their way, including Mississippi and Connecticut.) And while that may be the case, online and mobile sports betting is not likely to proliferate nearly as quickly as land-based wagering. Here’s where we’re at in the United States in terms of online…