A-Frame (https://aframe.io) is picking up traction. For many people, Unity is still to difficult to learn, takes work to get an app going, and get distributed.
With A-Frame, you can build an VR site with just an HTML file, open it in your Vive, and publish to the Web immediately. Though it's just HTML, it's based on the same architecture as Unity (entity-component), and can do powerful applications (TiltBrush on the Web https://blog.mozvr.com/a-painter/).
With A-Frame, you can build an VR site with just an HTML file, open it in your Vive, and publish to the Web immediately. Though it's just HTML, it's based on the same architecture as Unity (entity-component), and can do powerful applications (TiltBrush on the Web https://blog.mozvr.com/a-painter/).