Industrial design student and Instructables submitter, Castor Bricoleur, lives in a small apartment space where his IKEA STOLMEN shelving system has been modified to allow for a full 180 degrees swivel, so he can watch his HDTV from both "rooms" divided by the unit...
From Instructables: Stolmen 180° Pivot TV Mount
Living in a small apartment require great organization. It is even more important when you live in an open space apartment or a loft. When I moved into my new apartment (a loft), I installed a Stolmen system to split the main room into two separated spaces : the living room and the bedroom. To make my project more interesting, I decided to include a LCD TV and make it pivot on the central post of my two sections system. Doing so, I'm now able to watch cartoon laying in my bed on Sunday mornings.
Here's another example, where the 180 degree swivel feature has been built into the wall between two rooms.
This bookcase version swivels to hide the TV away, so you can pretend you actually read books instead of watching bad reality TV!