As I understand the ruling, Nothing has changed. The SC has ruled that the ATF's interpretation of a Straw purchase that they have been using since the early 1990's is correct.
Kinda goes like this.
Buy a gun as a gift, no Straw.
Buy a gun to keep, no Straw.
Buy a gun to keep and later decide sell it, no Straw.
Buy a gun to sell, but you do not have an actual buyer at the time of purchase, No Straw.
Buy a gun for specific person with the intent to be reimbursed $$, Straw.
Buy a Gun for another person with the other persons $$, Straw.
Correct me if I am wrong, but wasn't Abramski'a argument that his deal with his Uncle was not a Straw because (A) they transferred the the pistol through and FFL and (B) it was not a Straw because neither one of these players were Prohibited Persons.
Didn't this ruling just clarify this prohibited Persons stuff, meaning that a Straw is a Straw no matter if the recipient of the firearm is a prohibited person or not.