I have never known Sony to be a low price leader in anything. Just pointing that out.
For a full list of hardware releases...
VR Hardware Release Dates | VR Goggle
If you are looking at PlayStationVR for porn, be aware Sony still does not allow Adult on their platform.
However, it would be hard to stop a 360 video stream or 360 media file on any platform.
I can see that in about 3 years, a new VR / Holo experience will be coming our way nearly everyday. Each one out-doing the previous. The biggest thing will most likely be scarring folks since it seems to be easy to make someone poop their pants in VR.
HoloDeck Sex is just around the corner.
Japanese news anchor gets freaked out by VR, smashes Rift on live TV