Just for the sake of clarification, they did not review buzzer beaters at that time via video. No one in the house really questioned whether it counted. And I mean that in a matter-of-fact manner, I do not intend to sound like a punk or anything, just a random fyi.
And just for another friendly fyi, the Pistons were playing in the Palace by 1990 (The Pistons won both the '89 and '90 championship at the Palace in fact - its first two seasons).