Well, since I only have a toaster-tier PC that can not run VR and I already have a PS4 I know what I'll be getting.
PS VR is the only platform where we KNOW there'll be waifu simulators. Heck, it was one of the first demos in fact.
Oculus Rift is heavily shoehorned into their particular store-front system and will probably be a drag to use outside of their ecosystem.
HTC Vive is not confirmed to be particularly restricted yet, except it will of course be directly supported by Steam, but it will likely be the most expensive option.
Best bet for PC-VR is to wait until next gen when hopefully the graphics cards and processors have caught up and dropped in price. They will probably be ahead of the development for longer than the top of the line GPUs required to run the rift optimally now, which are overpriced now and will probably only last this gen. Considering how VR iterations will be like with smartphones, if we are to believe that, then shelling out hard cash for a VR rig now is extremely unwise unless you are swimming in cash.