Gadget Show Preview

FILE - This undated publicity image provided by Sony shows an  ultra-HD 4K TV set.  At the biggest trade show in the Americas, which kicks off next week in Las Vegas, TV makers will be doing their best to convince you that HDTVs are old hat, and  should make room for "Ultra HDTV." (AP Photo/Sony, File)
FILE - This undated publicity image provided by Sony shows an ultra-HD 4K TV set. At the biggest trade show in the Americas, which kicks off next week in Las Vegas, TV makers will be doing their best to convince you that HDTVs are old hat, and should make room for "Ultra HDTV." (AP Photo/Sony, File)

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