I hear that people with true multimonitor setups, that shield streaming disables the other monitors any ways.
I found a work around, it's kinda dumb, but works.
In my case my monitor is a 100" projector, so great for movies, So I got my old blackberry playbook, installed plex on it, and connected it to a second input on the set up. So essentially I stream to the shield games and stream movies to my projector at the same time.
I mean it would be WAY better if I could just use my desktop at the same time using the shield but hey, it works.
I am no programer or anything, but, couldn't they make game streaming like a "media sever"? Something that runs in the background with no visual rendering on the severing computer?