OpenGL ES 2.0?

So, I just started learning OpenGL ES 2.0 when I realized...

it's not on the iPhone yet!

Any idea of how long it'll be before Apple does that? Has Apple said or hinted at anything one was or another? Is there any reason to keep on learning OpenGL ES 2.0 or should I return the reference book I got for one on Open GL ES 1.1 instead?