The killer app probably wouldn't be a steambox exclusive but a steam exclusive. Which means that you'd be able to play it on practically anything you can throw

The killer app probably wouldn't be a steambox exclusive but a steam exclusive. Which means that you'd be able to play it on practically anything you can throw at it. PC, Mac,Steambox, and it won't surprise me if you'd be able to pair up your steam controller to your tablet and be able to stream the feed from your PC ala nvidia shield. In terms of convenience, tying it to steam will do way more than it being exclusive to other systems.