Try not to misunderstate what the problem was/is. The 1968 GCA allowed adjacent interstate sales of long guns but required that handguns be purchased by non-licensees in their state of residency. This ruling just knocks out the difference between long and hand-gun. So far I can’t tell if it knocks out the contiguous state provision. In either case it’s a large deal.
The contiguous state provision was struck down years ago. As long as your state allows you to purchase out of state, and the state you're in allows sales to out of state persons, you can buy from an FFL.