I think Shapr is an excellent candidate for VR. Interfaces that require traditional input devices (mouse and keyboard) don’t translate well to tablets nor VR. I have experienced no other UX like Shapr’s, and I think it would be incredible in VR. I’ve played around with a few drawing apps in VR, including my employer’s (shameless plug) Harmonix - Music VR, and creating content in virtual reality is otherworldly.
When you’re done with that, a sculpting app would be great, too.