TvGameLauncher
Launch apps/games on your HDMI-connected TV (or any other display)
Launch any file or game (including Steam games) on your TV (or any other connected display), making it the primary monitor, setting HDMI audio as the default playback device, darkening all other displays, and preventing computer sleep / hibernation / screen saver. All changes are reverted once the game exits. Utilizes NirCmd by NirSoft: http://www.nirsoft.net/utils/nircmd.html
For a 5 minute tutorial see https://www.youtube.com/watch?v=z8N5RPswlH0