Football players must keep social distance (SD). They have smart specs and sensors. Specs help players assess SD situation, threats and opportunities quickly. Sensors warn about a danger to violate SD.
Field players may kick the ball with hands, but are not allowed to catch it.
Referees have sensors that signal about violation of SD and indicate who should be punished.
Specific revenue streams:
1. High brand equity of the first mover and early adopters
2. Sale of special equipment to players, service staff, spectators and learners