Sofa Chair Arm Rest TV Tray Table Stand with Side Storage Slot for Tablet Magazine by KeoDecor on Etsy [maybe a stability upgrade over the ones that sit on the arm only plus tablet or small reading storage}
This a drop table. A small part of it is affixed to the wall and could serve as a space to place your things in. Then it could be propped up by a support underneath that will hold it up and become a table. It also comes with a socket underneath for your charging or your light.