This article from SymbianOne is a interview with Xen Games and their transition from their own engine to OpenGL ES on Sony Ericsson's UIQ 3 phones. " As we concentrate on high quality games, which can take a year to write, we don't see any point in creating a game that is not OpenGL ES 3D enabled. It makes no sense to write a game for a device with a 3D chip without using its features. To use the chip you need to use the standard APIs and OpenGL ES is the most widespread standard on phones... The main advantage with OpenGL ES is its cross platform support."