Have you experienced it yourself? I mean, it's basically the same as saying Why ride Gringott's or Spiderman, when you can just ride a regular ride without screens?
Sure, it isn't as interactive or as good as those, but I don't think it's a bad concept, especially for a low-cost way to bring new life to older attractions. Yes, the extended queue timing can be a bad thing, but I think it will improve.
By the way, the thing that I got most excited about beyond anything was that at USJ, Space Fantasy, the indoor rollercoaster now has a Final Fantasy VII VR overlay. I really wish I could go back there soon.