By now most Americans have taken the leap and tossed out their old boxy televisions in favor of sleek flat panel displays. Now manufacturers want to convince those people that their once-futuristic sets are already obsolete.
After a period of strong growth, sales of televisions are slowing. To counter this, TV makers are trying to persuade consumers to buy new sets by promoting new technologies. At this week’s Consumer Electronics Show, which opens Thursday, every TV maker will be crowing about things like 3-D and Internet connections — features that have not generated much excitement so far.