Exactly. Though I think the ES version will probably always lag behind due to Smartphones/Tablets being by necessity less powerful than Desktops/Laptops -- I'm secretly hoping there will eventually be a WebGL that (1) like today guarantees the ES feature set but (2) lets you query and "switch on" full-fledged desktop OpenGL capabilities just like WebGL extensions -- so that we can utilize more/all of the GPU if the GPU happens to be not on a Smartphone/Tablet but on a high-end desktop/laptop. Right now I think this is against Khronos design philosophy behind WebGL -- but eventually one of the implementors (Mozilla or WebKit) may have a strong need for this and add it. Here's hoping.