The unknown reality of VR goggles

San Francisco

FOR game designers, virtual reality became a real business when the virtual reality equivalent of Apple's app store for iPhones and iPads opened its digital doors.

If you make a game in virtual reality, or VR, you can now sell it to customers instead of giving it away. It's the biggest step yet towards discovering what kinds of creative works will prove most successful in this new medium - an immersive, sensorially isolating experience that is either the art form of the 21st century or the biggest fad of 2016.

Last Monday, the store inside the Gear VR, a headset powered by a fancy Samsu…