I think their concern is that the hardware drivers have bugs in them that could lead to remote compromise, not that access to the GPU. Microsoft knows somethin

I think their concern is that the hardware drivers have bugs in them that could lead to remote compromise, not that access to the GPU. Microsoft knows something about this, as the execution of untrusted/unsigned shader code allowed the Xbox 360 to run unsigned code back in the day: http://en.wikipedia.org/wiki/Free60 http://en.wikipedia.org/wiki/Free60