The quoted law review article was written in 1982 and is woefully out of date. Pennsylvania has probably the most favorable statute in this country in protecting theatre owners.
There was an anti trust lawsuit filed in Pennsylvania in 1994 brought by the Roxy Theatre on Sansone street in Philadephia based in part on the Pennsylvania statute. Roxy owner Max Raab filed suit against Miramax films (then owned by the Weinsteins) claiming Miramax would only license to the nearby Ritz theatres in direct violation of the Pennsylvania statute. Roxy actually recovered a jury verdict in its favor against Miramax for about $160,000.00. However the federal third circuit court of appeals overturned that verdict holding that the Federal Copyright Law supercedes and controls in the area of motion picture licensing. The opinion written by the third circuit is chilling and essentially says that the studios can do whatever they like in licensing their product.