Well, I would be surprised if it would be allowed. NFL uses headsets right now with strict rules. One interesting question is if there was any benefit of this

Well, I would be surprised if it would be allowed. NFL uses headsets right now with strict rules. One interesting question is if there was any benefit of this compared to headsets. I think there could be several: - Potentially less latency in perception of the desired information. - One independent communication channel next to the headset. On the other hand the one pixel display is really a one-bit wide channel and it interferes with the view of the player. It could be distracting. Also there could be other alternatives to one-bit wide channels. One could be a "touch" channel somewhere on the neck. This could have comparable latency (if not faster) to the contact lens, also it seems much cheaper. I don't think it would fit well into sports though.