OpenGL ES is widespread in the phone and tablet space with more than one billion units expected to be shipped in 2014.
OpenGL ES is the 3D graphics API for Android, and is the underlying technology behind WebGL. A great deal of what we have seen carries almost directly to the Android platform.
Transitions to more complete versions of OpenGL are generally painless. That is a conversion from WebGL to OpenGL ES, or from OpenGL ES to OpenGL should flow smoothly. Indeed, the more complete version may contain additional features or functionality that make some tasks easier.