This undated image provided by Sony shows an ultra-HD ‘4K’ TV set. High-definition TVs roughly quadrupled the resolution of the sets that came before them. Now, the industry is poised to do it again as Sony says its U.S. stores will, by December, sell a TV set with four tims the resolution of today's best HDTVs. (AP Photo/Sony)

Associated Press
This undated image provided by Sony shows an  ultra-HD ‘4K’ TV  set. High-definition TVs roughly quadrupled the resolution of the sets that came before them. Now, the industry is poised to do it again as Sony says its U.S. stores will, by December, sell a TV set with four tims the resolution of today's best HDTVs.  (AP Photo/Sony)
This undated image provided by Sony shows an ultra-HD ‘4K’ TV set. High-definition TVs roughly quadrupled the resolution of the sets that came before them. Now, the industry is poised to do it again as Sony says its U.S. stores will, by December, sell a TV set with four tims the resolution of today's best HDTVs. (AP Photo/Sony)
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