If the Steam Machines come out with Windows 10 on them, they can beat the XBox and Playstation units with the unlimited library of games for Windows. I think SteamOS is not ready for prime time yet.
The PC Master Race has an advantage with Windows 10 and a gaming PC being upgradable. Valve's Steam really delivers the video games and has sales as well. I don't think that can be beat.
Video game consoles use PC technology now like AMD or Intel processors, etc.
You'll never see an AmigaBox or AmigaStation because they lag behind in technology, but the Amiga plays classic games alright. The Armiga does that just fine: https://www.makeuseof.com/tag/armiga-amiga-emulator-giveaway...
So don't forget about the competition out there, I heard rumors that even Sega wants to make a new console. The old retro video game systems like Armiga and that new Atari box will compete as well, unless the XBox and Playstation emulate the retro games as well.