My Take
Overall, I would definitely use this in a classroom (using it to further student's understand). While this is a great tool, I do worry the technology is not completely there and the price is a concern. While Google Cardboard is somewhat cheap, buying headsets for a whole classroom is rather unreasonable. With small groups, I think this could be a transformative tool though!
How I Use It
In the classroom, I would use this as introductory tool. For example, I would love to have a station where students could explore within a 3D environment, such as Mount Everest (when learning about mountains).