I agree that I wouldn't get it in addition to a desktop PC (for one thing, I haven't owned a TV in 20+ years so couch gaming isn't a thing for me) but when the time comes to replace my current box I might well consider whatever Steam is offering at the time. Just because it's likely to be nicely designed, thoughtfully specced and decently supported.

Memory (both main and VRAM) might be a bit on the weak side for some non-gaming workloads though. I hope we'll see those bump up once the current supply squeeze is over.