Tube TVs are comparatively cheap and their image quality is good, but they take up way too much space and weigh a ton.
Rear-projection TVs deliver the most picture for your dollar, but
they are sensitive to the angle at which you view them (too many
degrees up or down and the screen goes dim), so they don't work
very well in living rooms and bedrooms, where people watch TV in
assorted positions or while moving around.