Barely four months into the year and the NFL already faces daunting challenges on multiple fronts. They have been created by tech, business or both, and addressing them will go a long way toward evolving America's game for years to come.

They include fan concerns about too many commercials, a more engaging viewing experience (360-degree replays) and a proposed overhaul of instant replay for the 2017 season. Broader impact issues include introducing player safety products and handling a data deluge fueled by player health info.

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