I wouldn't be surprised if more people bought the PS4 Neo for the 4K video, both UHD Blu Ray and the Netflix and other streaming clients, than PSVR.
If there is a uhd drive then it will probably be quite a draw to a small minority but who has a 4k TV and does not have 4k streaming? If it's too old to have thoes it's unlikely to have HDMI 2.0 and or the new hdcp required to receive the 4k image I would suspect