It's tiny. It runs SteamOS which is built to be used with a controller on a TV. And it will probably be a performance target for many developers.

But I think the biggest feature might be the quick suspend and resume. Every modern console has that, but not PCs. You can try to put a computer to sleep, but many games won't like that.

My Windows desktop doesn’t like that. It wakes instantly, no idea why.

Not to mention windows laptops waking up in bags or backpacks in the middle of the night seemingly for the only purpose of burning themselves up.