All of those platforms are HUGE and well worth the hassle. I think Valve is trying to leverage the Steam Storefront into a full-fledged Platform. It is not qui

All of those platforms are HUGE and well worth the hassle. I think Valve is trying to leverage the Steam Storefront into a full-fledged Platform. It is not quite there yet. As such, they have invested a lot of effort into the compatibility layers, which allows gamedevs to support Steam Devices with no extra effort, or minimal effort, which is very important business vise. As a gamedev, you essentially get a bonus platform for your game without extra dev effort!