The guys at HD Guru have shed some light, literally, on a bit of trickery retailers use to make lower performance HDTVs look more enticing. Have you ever noticed how bright the lighting is in many electronics departments?
Remember all the problems people had with washed out colors on their Xbox 360 when using a VGA cable? Well, the Spring Update actually offers a fix to those problems, which came from different interpretations of black levels on HDTVs and PCs. Adjust the new settings in your display and you'll be set.