"The Wayfair decision looks like a sales tax game-changer for many New York galleries."

Says Tom Danziger in this artnet piece on a recent Supreme Court decision involving the power of states to require out-of-state sellers to collect sales tax on objects shipped into the state -- say works of art, for example.  Here's the New York Times story on the decision.  More here generally, and more here as it relates specifically to the art market.