There are more than a few reasons why you would want a  42 high definition plasma tv . The 42 in this case means 42 inches diagonally, which makes these types of sets superb for a home theater system. Their flat profile allows them to be placed in very tight spots without compromising the optimal viewing angle of these sets. Also quite notable are the very rich colors possible with a 42 high definition plasma tv that are simply not possible with competing technologies. They will also be able to handle HDTV broadcasts that are the norm these days in many parts of the developed world.