found some shy JPG's
(2D layout) https://cdn.archilovers.com/projects/d9232647-c635-4c30-9603-7cddb7e47f3d.jpg
(3D artistic) https://cdn.archilovers.com/projects/5501e6e9-5c35-43aa-83e9-1885110d03d0.jpg
so it's just hundreds of monitors, not thousands - their HTML video wall (one of the many showing error messages) was just 54 super giant monitors in a wall. I tend to agree that if it was 100s of RaspPi's, the supermarket of the future - a place to get food and meet people - might have been a bit more responsive..
the food was nice tho'