Sadly I can't see it.
Doe this mean that the new air benders are descendants of the Air Nomads?
Not direct descendants because you know, Aang & Katra only had Tenzin.
Here is what Bryan said:
Harmonic Convergence was a major event where some crazy spirit energy we saw, it washed over the globe, pass over through everything, every person. It remains to be seen what effect that has on people and the world.
To me, that means it could either change or awaken the ability to bend air. Not necessarily being descendants because Opal is not a descendant of the air nomads She's mainly from Earth heritage.