"Today, we’re introducing a preview of WebGL 2, which is still under development by the WebGL working group. WebGL 2 is based on OpenGL ES 3.0, and brings with it many improvements and additions to help developers create stunning visuals on the Web. WebGL 2 will raise many restrictions and add new capabilities compared to WebGL 1. For example, while WebGL 1 only required support for being able to render using 8 textures at a time, WebGL 2 raises this minimum limit to 32.
WebGL 2 also includes requirements for higher precision in fragment shaders, adds support for features such as occlusion queries and geometry instancing, and introduces developer-controlled access to antialiasing, multiple render targets, and more. All of this combines to enable Web developers access to more advanced graphics on both desktop and mobile platforms."