Steam Machines have a lot to prove. They're decent gaming PCs, but running SteamOS instead of Windows - so, is the inclusion of a Steam Controller, a compact build, and a great living room experience enough to justify buying one? Luckily, we didn't have to, since Alienware sent us one to fiddle with. But we thought hard about the question anyways.br br More info on the Alienware Steam Machine (launches Nov.