Here is an ergonomic laptop/keyboard mount that turns your office chair into a workstation. The Sunter98 OK010Lapotp/Keyboard Station attaches to any chair with a round bar of 1.96 inch diagonal. It has rotate and tilt options, so you can work and play games comfortably.
This laptop stand has 20kg capacity. It ships with a keyboard holder, mouse pad, mouse mat, and 3 stainless steel tubes.