There are some features of a laptop that take its toll on the user, the first is the occasional back ache from leaning over it and the other thing is the heat generated from the extended use, this can really be problem for the laptop itself.
This has to be one of those ideas where we think, I could have done that. However, of course we never do, this will keep the heat out of your laptop and off your knees. It gets its power from the laptops USB port.