this is a picture of the Q-Front building taken this morning. The large screen has definitely been removed, and it doesn't look like a temporary measure to me, given that the first reports on the internet surfaced last summer:
The ad agency running the screen at the Q-Front Bldg. announced in October 2012 that they will stop airing ads as of January 2013. Instead of the screen they will offer "visual sheets" (Q's Wall + Q'sEYE) as displayed on the photo.
We may have jumped the gun on this. Someone posted a comment at my blog that a smaller monitor screen is to be installed and ready to go by August 1. We shall see...maybe.