Obviously this is PR. Yes, the concept would work in the few airlports where the gate space allows for the angled gates.

Hell, how about just pulling in parrellel and thus pushing directly forward? As long as space is not an issue, I would be certain that works best.

I am reasonable certain every major operator could figuire this all out. But not even DL can convice ATL to space their gates less dense (same UA/EWR, AA/DFW). Maybe a few edge case airports it works is all.