Sharp has developed a prototype 52-inch LCD TV that at only 29 mm thin and outfitted with an automatic pop-up mechanism can conceal itself in your bed's footboard. You can also purchase a TV lift here that enables you to install your TV into your cabinetry as a more inexpensive option. Check out the demonstration below.
unclutter.com has also provided some other options that provide you with eye-catching ways to integrate TV lift technology into custom cabinetry in order to conceal your flat-screen when it is not in use: