My 'BS Meter' is about 50% of full scale.
Some say it's exactly the same thing as MIMO.
To me, it stands out like a sore thumb that they've demo'ed it with just 2 channels (as opposed to a number just ever so slightly closer to "infinity", for example 3). Using polarization to provide 2:1 frequency reuse is as old as the hills. So they've demo'ed exactly nothing.
There's an old concept about layering differential circular polarization on top of H/V linear systems (and vice versa), but it was anticipated to be a very narrow increase in the total bandwidth.
::suspicious::