Someone should make an OpenGL ES 3.0 engine that works on all of these platforms by default: Win/Mac/Linux/Android/iOS/WebGL (or Native Client, at least). I think it would be very popular in a year or two. I've been enjoying indie "mobile" games for PC's a lot more than AAA type games lately, because they are easy to get into and fun. They seem to focus more on game-play than "regular" PC game developers do.
I've been looking for something like this for a while... I'm writing an application that I want to have run on PCs as well as my Raspberry Pi (using Python preferably, although C++ is always an option), and eventually, I'd love to be able to port it to Android (+WP/iOS/BB/whatever else) as well. I'm still at the deciding state, obviously, as this is not a common thing for some reason. However, I'd love to use Python, so I'm comfortable with just having PCs and an RPi for now - but that still begs the question, is it possible to create an application (using restricted OpenGL calls) that works with both OpenGL full and ES systems without modification?