I agree. Sure it's fun to hypothesize but theres no proof that this will add height. The San Francisco tower utilizes the mechanical screen for the video board. There is already a large mechanical glass screen at the top of WPS according to the most recent renderings. I could see a scenario where they just retrofit the existing mechanical screen with LED's.
That would be great though if this tower was bumped up at a minimum 50ft to push it to 1,000.
Photo credit to Curbed Chicago