Anyways, this is just speculation from my part though…
Pretty much correct. Yes, shaders will be standard glsl source code to start with, and there will be some useful ‘stock’ shaders provided.
A ‘node graph->glsl’ tool is certainly a possibility for the future, but v1.0 probably wont contain any gui tools, just the ‘backend’ for any such tools.
There’s a good chance I will write some plugins for ted2 – in mx23d – that will allow you to at least ‘view’ 3d media files though – and if there’s ever anythng like a Maplet2, this will also probably end up in the form of a Ted2 plugin.