These are often too narrow and end with your face in the screen. I've apparently got perfect vision but had difficulty focusing when I attempted such a setup using standard-depth shelving.

Market opportunity: Resell standard Ikea shelf kits as "wall-mounted standing desks" and capture a price premium from bcoates.

It probably would, but I was hoping for something a little more built-to-task: holes for cables, a grippy surface, the right size, etc.