I live in residence, and have no TV in my room, so I was thinking of buying this... CLICK ME! But the problem is, I don't think I have a cable jack in my room. I might... but WHAT IS THIS I HAVE ONE OF THESE IN MY ROOM? Is there possibly cable behind it? And if the answer is no, then I was thinking of buying one of these... CLICK ME! Now, they seem great and all, but my question is... will these be affected by the switch to DTV? I know antenna TVs are affected, but do these count?