I was reading that only 17% of PC owners can actually use the rift (their specs are too low), while 100% can on the ps4. That's a big difference. I can see people building VR ready PCs, but that's at least another $1000. So we're looking at $1600 for VR on the PC (probably more for the Vive). If Sony can release the PSVR for $300-$400, that significantly reduces the cost of entry. They could own the market, for real.
These first few years of PC VR will be for the enthusiasts only, with very strong PCs like mine. You can't have bullshyt specs and expect VR, but you can have a $350 PS4 and get VR.