The problem with this seating arrangement is that people will not be able to leave the plane quickly.
I believe there’s a time spec that aircraft manufacturers need to meet and I can’t see this meeting it.
In terms of shoulder room this is an interesting idea. But you may be right about evacuation, unless all the sets rise up when unoccupied. Then there’d be more space to move toward the aisle than the current “sardines all facing forward toward the same fate” configuration. I know my wife gets motion sick when facing backward on a moving train, so extra barf bags might be needed :).