Its a tough sell when you can build a better machine for less money.
Like the only things I assume the steam machine has going for it are the form factor (which is nice) and the fact that I assume its very silent.
Like you could just build a small form factor pc for the living room + throw steam os on there and buy a steam controller separately
Plus if we are being honest this is mostly an indy machine ....like if you wanna play the new GTA 6 for example you are better of buying a playstation 5 pro