Many of us are going to get our hands on an Oculus Rift headset soon. Online stores such as Amazon are already listing Oculus Ready PC bundles. You will soon be able to order Alienware, ASUS, or Dell computers bundled with an Oculus Rift headset.
These machines come with an i7 processor and graphics card good enough to handle this VR headset (e.g. GTX980). They run Windows 10. You can find out more about these Oculus Ready Desktop PC bundles here.