I think the PS VR comes with it's own external compute unit that is made specifically for plugging into the PS4. The PS4.5 may have the unit built in so that it can have the VR bundled or use a cheaper VR unit that doesn't come with the compute unit.
You spelled Newb wrong. just joking you can spell it anyway you want. But the VR for the Playstation looks cool. I hope my cousin gets it. he has the PS4. I would like to try it. imagine doing GTA with Playstation VR.