Once done, special holders will clip onto the horizontal rails anywhere I choose. It's made to be very lightweight with the rails being only 1/8" thick since they are strong plywood and won't hold anything even approaching heavy.
It's a little crude, but being a prototype made from scratch wood and a few screws, cost so far is less than $1.
Paint may add another dollar :-)
Hopefully it'll be very useful and keep the devices , cords, tv remotes , etc close by and ready to use. Also hope to keep from crushing eyeglasses when I take them off !
I'll also add a power strip and a LED gooseneck reading light.
I'll post pics when it's done.