After relative silence on 4K UHD for sports, there are signs of change as at least one top broadcaster, tech innovator CBS, is planning to experiment with the higher resolution format (twice that of 1080p HD) for some NFL productions this season.

The experts at CBS, which pioneered live streaming of March Madness around the millennium, and helped develop what is now Intel's Emmy-winning freeD technology for 360-degree replays in the NFL, had said several years ago that 4K was years away. Perhaps it's time has now come.

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