I've got a real-world variant on the classic "Are Carousels Effective" question. My office, like many others, has a 40 inch LCD TV hanging on the wall in the lobby, and on it displays a looping slideshow (PowerPoint presentation) with various company news, photos, and related items on it.
I've always wondered, is this an effective way of conveying information? As the linked question suggests, homepage carousels are generally regarded as effective at selling a design to stakeholders, but not particularly effective in getting information to users. Does the TV in the lobby suffer from the same fate?
And how much does the answer change if the TV isn't in a lobby? What if you had a looping slideshow on the wall hanging above a row of cubicles? Would this make it more or less effective?