In class we experienced some VR devices and here are my thoughts on them:
Google cardboard: the device is very simple. We can easily make it yourself. It is very portable and easily stored. Just unfold it to store and fold it up if you want to use it. However it needs handling with care since it is easy to break. You need to hold it up with your hands when use it.
Common smartphone/tablet 360 video: the device is very much similar to the google cardboard but sturdier. It needs storage space since you cannot unfold it. It is cheap but not as cheap as the cardboard. One more advantage is that it has a strap to stay on your face
Both devices work nicely. They hold your smartphone in front of your eyes. You can turn around and the pictures/movies move accordingly. I think they are good for everyday entertainment like watching movies at home, seeing pictures, etc. You can bring them on your camping trip where you need to pack light
Vive head mounted display-Google Earth: the system is not portable, very expensive set of display. It has long wires thus tripping hazard. It has a monitor so other people can also see what your seeing in the VR. It support forward/backward movement, i.e., it zooms in/out to make the feelings of going forward/backward. Thus you feel more like you are in the actual place. The handheld devices are very cool; they help you interact with the devices. It can be used in the travel industry. People can virtually visit other places without actually go there.
Spacecraft 3D: very cool application. I especially enjoyed the ones with animation. I could imagine it will be used in classroom to facilitate the learning process
Quiver: similar to Space craft but more hands on since you color the pictures and it will display 3D object with those colors. I can see it will be used in interior design to help designer find good color combination. Besides, this can also be used in classroom to make learning more interesting
VIVE head mounted display - NVIDIA VR Funhouse: Another VIVE system with application in gaming. I played the archery game. It was very intuitive. The system tracked my movement very well, which gives me the feeling of actually doing it. Again, it has all the advantages and disadvantages of the Vive head mounted display I listed above.
CAVE 2: I felt like i were inside the object (the brain, the molecule). Especially when I wore the glasses with the tracking antenna, the system tracked my movement and displayed accordingly. I can see that this would be very helpful in science classes, especially chemistry, biology or physics where the artifacts are abstract (gravity force) or too small (atom) or hard to obtain(human brain). One advantage of this system to the HoloLens is that it can accommodate many people. The disadvantage of this system is that it is expensive and hard to set up; you need special training and knowledge to install it. The second advantage is that the data is not easy to obtain. You need special cameras or do complex process to convert 2D images to 3D
HoloLens: It was another cool device. The air tap did not work well for me but it listened to my command which is one advantage to the other system. Another advantage is that it does not completely block my view so I could see what was going on. It is also its disadvantage since user do not feel immersed in the virtual reality. It also track my movements like other systems to display the object so it gives users the feeling that the object was right in front of them; they can walk around it, zoom in and zoom out from it. Another advantage is that it does not have any wire, just one headset so there is no tripping hazard. I think one more disadvantage of this device is that the display screen is small so it cannot display very complex images or movies. I think this one would be great to use in classroom, like in the demo, to get insight knowledge of different part of the body and how they are connect.