Google cardboard is new technology it called virtual reality, this technology seems to enter the virtual world.This is only use mobile and better version of computer.
This is the only option where the mobile going to big screen, put the mobile in cardboard and see the big scree movie game and 360 degree video.
I have purchase VR headset from amazon and this is amazing VR headset I am playing VR games, 360 degree video and movie with 3D view my mobile look like a big scree and I feel sitting on big theater, so this best technology by google.