News Sharp Unveils New 120-Inch 8K Display: Up To 120Hz, HDMI 2.1, 2048 Dimming Zones

>> "Featuring a 120-inch diagonal size, the Sharp 8M-B120C is enormously large and measures 107 x 32 x 78 inches (2717 × 805 × 1979 mm)...."

The display looks a bit thick from that side-angle shot, but surely it isn't 32 inches deep? I'm guessing that's the depth of the base, not the panel?
 
At 120", can you even tell the difference between 4K and 8K? Between 1080p and 4K, yes, at around 55" or so, I believe, but I believe that was a big jump between 720p and 1080p, I imagine being able to tell the difference between 4K and 8K is an even greater jump.