Today, flat-panel TVs are gaining popularity, and a kind of ultra-thin picture tube TVs that imitate the shape of flat-screen TVs are more than ten centimeters thinner than ordinary TVs. They appear in home appliance stores. It was awkward to sell when it went public. What does this passage say? ['"Flat TV" will continue to occupy the mainstream of the TV market.', 'The market position of "ultra-thin picture tube TV" is not clear enough.', 'Compared to "flat TV", "ultra-thin picture tube TV" does not have a competitive advantage.', 'Compared with "ultra-thin picture tube TV", "flat panel TV" is more in line with the actual needs of consumers.']