Might also pose a technical problem. Streaming sports events requires a high bandwidth/very high speed internet connection. Because of the constant action the content is difficult to compress if image quality is to remain high, especially with the huge data of real 4K.
NTEK's claimed 4 Mbps 4K minimum speed won't do by far, so that edge over the competition is lost anyway.
I wouldn't count on NFL game streams, at least not in the near future.