I understand that the market trend is away from the old 4:3 screens to the new 16:9 widescreens. Why?
It’s a larger window, needed for optimal viewing of movies. The film industry made the transition to widescreen in the 50’s and nearly all movies are now shot in widescreen. When you see them on 4:3 TV screens, either the sides are cut off, or black bars appear above and below the image. HDTV in widescreen is the first major change in the TV-viewing format since the introduction of color in 1954.