The browser app for creating CoSpaces spaces has been designed for the use with desktop computers or laptops. If you install the mobile app on your tablet, you can also create VR content here.
We have already started exploring the topic of building in VR. In fact, we are currently collaborating with the LMU University Munich on this. However, because of the complexity of the subject, especially with regard to supporting different VR devices, there is no exact timeline for the release of this feature, yet.