I'd like to be able to, like with a PS3, pick up my controller and hit a button and have Steam Big Picture load up.
To complicate the situation, I already have steam running (to keep games up to date) so it really needs to just launch Big Picture mode, not another instance entirely. I also don't want to use the built in option to launch Steam in Big Picture mode as that will just suck up gpu power all day long for no reason.
Does such a software switch exist and if so how can I map it to a controller button. (I could maybe use some logitech direct input software to make the later happen but I'd still need a switch)
The only thing that comes to mind as being close to what would work is when I use in-home streaming it will autolaunch Big Picture on the source machine via software. Can that be tapped somehow just locally?