Zenith 42 Plasma HDTV sets, also known as plasma HDTV displays have been obtainable for several years; however, they are more popular than ever today. The outstanding reason for the recent boost in popularity of Zenith 42 Plasma HDTVs is that they used to be very expensive, but now, since a lot of manufacturers are making them, the competition has grown and the cost of the plasma televisions has decreased.