Another example for a sales pitch.
I just spent 5 hours tonight mounting a plasma above a fireplace and running cables. Mounting the display only took 45 minutes.. it was the fishing, pulling, drilling, for the cables that was the pain in the ass. (Combined with the fact that the home owner insisted I use his cables, which I kept telling him were too short, but he didn't believe me until I pulled them)
Now if he had a conduit from above the fireplace to beside, it would have taken another 15 minutes to do the cabling.
So for new home owners, this is also something I am recommending.. conduit from above, to beside. Not going to put a display there? Then put a picture to cover the inlet and thank me later when you do actually want something electronic above the fireplace.