Great point. And how often, when you put a laptop down and open it, do you leave it exactly where you put it without adjusting it slightly? You weren't trying to put it down wrong, you just found you needed it moved a tiny bit.

Left-handers are notorious for needing writing things at a slight angle, and sometimes as much as 90 degrees from normal, but those shown in the demo are perfectly aligned with the table and tile edges. These are not for real people.