This is dumb. Valve doesn't state "console" anywhere in their PR. It's PC gaming. It doesn't say "It's a console AND PC", it says "it's optimized for gaming AND is a PC".
Your games on the big screen
store.steampowered.com
They just borrowed some features that are console like, nothing else. We have had the console like interface for years, we have had full gamepad support for years, we have had mini PCs with fixed hardware for years. Nothing here is new. The OS is just working better than before, but that doesn't make this a console. It is still the same open platform as before.