There have been quite a number of blog posts lately on the subject of WebGL, an embedding of OpenGL into web browsers.
There are, of course, security repercussions associated with exposing OpenGL to web pages. The attack surface is increased as clients can now target flaws in the device drivers, and attempt to get data off the graphics card which is associated with another operating system process. One security company has posted some initial work in the following blog posts here and here.
Microsoft has DirectX positioned as a competitor to OpenGL, and this blog post covers the history of the history of the development of these technologies and why they came about.