The biggest value of an xbox is probably the heavily subsidised price point and access to a proprietary ecosystem and console exclusive games.
Unless Valve can pull out a huge amount of launch titles this will have a very weak ecosystem of it's own so will have to compete directly against other "gaming PC" companies such as Alienware.
Unless Valve can pull out a huge amount of launch titles this will have a very weak ecosystem of it's own so will have to compete directly against other "gaming PC" companies such as Alienware.