Building code concerning fireplace heat in California (and I believe the United States as a whole) states that a minimum of 2 inches between the TV and flue is needed to protect it from heat.
gas logs in the fireplace above are made by Rasmussen. You can check them out here: http://www.rasmussen.biz/logs/vented.html
If you want an "open hearth" like shown above, the most logical thing to do is to build a woodburning fireplace and add gas logs. There is a little bit of a trick to supporting
good example of scale of fireplace in our living room