Stores tend to present the best picture possible on big screen tvs. But rarely hook up a regular TV signal to see how bad it gets when you are just watching the current standard. So, how can you get them to show you a regular TV signal (non digital) if they won't hook it up like that?
Since some TVs are hooked up to a DVD player, is it a good test to burn your own DVD with a regular TV signal as the source? Would this be a realistic test of what a regular tv signal would look like on a plasma?