The PlayStation VR has been a move by Sony to get a higher-end VR experience into consumers' homes without the high price-point and complexity of a traditional PC-based virtual reality system like the Oculus Rift or HTC Vive. So far, it has accomplished this task although its performance isn't up to spec with its PC counterparts who have also dropped in price.
A big complaint from PlayStation VR customers is that the $400 bundle didn't include the required PlayStation camera so they'd be forced to dish out another $50 separately to get up and running. Sony has remedied this by adding the camera in future PSVR bundles for the same $400 price-point.
However, a two pack of the PS Move motion controllers are still sold separately for $80, or you can wait a few days when Sony begins selling their PSVR bundle with motion controllers for $449. Keep in mind, these bundles are for the headsets and accessories only, and you'll still have to own or buy a PS4 or PS4 Pro.