[AndreD]

could´nt that be a nice addition to mw materials?!
http://www.allegorithmic.com/getstarted

[eric nixon]

Procedural techniques are good for generating endless game content, but not much use for photoreal texturing.

For archviz I only use procedurals to generate 'fractal dirt' AmbientOcclusion maps - for use as mxm weightmaps.

[bograt]

I kind of agree with andreD,
Procedural and generative textures can be very helpful in the assistance of material creation if not entire material creation, I have been playing around with filter forge and it seems to me to be a HUGE advantage.
Maxwell renders natural anti aliasing benefits from detail in even the finest levels, generative materials can be a solution for achieving extremely accurate detail without using endlessly large gigapixel textures...