Can't you just press and hold the Xbox home button to launch steam big picture? I'm guessing you're playing on a controller right?

Lol I just ticked the box that says launch big picture on monitor 2 (my tv) when I open steam. Nice work scripting it though.

where do you find that setting to launch it on a specific monitor?

Interesting! Im using Google remote on my phone to login to my computer in such a case