If you have a mounted TV- you MUST do this! No more excuses! How-to: Mounting TV to wall with no cords showing. This is a good idea if you will keep your tv in one place permanently, as aren't renting, etc.
Lights could also just go from one side of the house to a central thing over the table. Like if I make a chandelier thing, that can be where they are gathered in. We'll see what looks easiest with the house.