What's the advantage of using OpenGL ES 2?

[AGP]

Future compatibility? Memory efficiency? Performance?

[EgonOlsen]

Flexibility! It allows you to use shaders. In addition, some features in jPCT-AE (like the AA or the advanced depth buffer settings...) are limited to 2.0+. In terms of memory or performance, it doesn't do any good. There might be some things that are faster in a 2.0 context but there are others that are slower, so it doesn't really matter. If you don't miss anything that 2.0 has to offer, i see no point in switching just for the sake of it.

[kiffa]

Any plan to support OpenGL ES 3.0? 

[EgonOlsen]

It's backward compatible with 2.0 (unlike 2.0 is to 1.x), so adding it shouldn't be too hard. However, that alone won't help much. I think that i'll add it once i'm in need of a 3.0 feature.