AMD R600g Now Does TBO, UBO & Advertises GLSL 1.40

[tomato]

GS are usually a speed drop, not an increase

Not if you count "not running" as 0fps and running at all as something larger than 0 ;>

[curaga]

Absolutely. Though, I have yet to come up with a good use for geometry shaders, but I may just lack imagination.

[marek]

I think the coolest feature of geometry shaders is layered rendering and it has a lot of applications. Layered rendering means rendering to several texture layers (slices of a 3D texture, faces of a cubemap) or viewports at once, that is with only one DrawElements call. The geometry shaders can choose/change the layer or viewport before emitting a new primitive. (BTW the viewport selection is provided by a separate extension)