High-definition TVs roughly quadrupled the resolution of the sets that came before them. Now, the industry is poised to do it again.

By December, US stores will sell a TV set with four times the resolution of today's best HDTVs, Sony said on Wednesday. The set will measure 84 inches on the diagonal, making the screen area four times as large as the common 42-inch set.

The BRAVIA 4K TV.

Executives said Sony will reveal the price of the set next week. Sony's Australia said the TV would be available in Australia by the end of the year but also didn't reveal a price.