I only had a brief look but was very happy so far.
Curvature Map
The map itself is pretty self-explanatory and has a bunch of controls for adjusting the angles, offset + gain (basically allowing contrast changes), using different colors/maps for any of the topology curvature types (concave-flat-convex), a section for breaking them up using a map for distortion (disabled in the demo) and controls for smoothing the map so it's accaptable for lower poly geometry (disabled in the demo) - really good stuff!
And you can do what I've been asking for in this thread in the first place - painting a gradient where inverted AO fails, this works on everything that has a hard edge (sm group boundaries too) as long as the mesh resolution isn't too lowres. This is great for blending a map on edges to achieve a worn edges look for example. Another plus is that there's no sampling involved so it gets noise free pretty fast and doesn't come with the pitfalls of inverted AO (different results for different sampling settings, pitch-black occlusion in certain areas with thin double-sided geometry or lots of details etc.)
One thing that's different of course that it will work only per-object since it doesn't involve any ray calculations to produce effects based on object proximity. You can still mix both to achieve this or use AO in the curvature map itself, although I didn't try that.
Tension Map
Didn't look into it, will have a closer the next days. I guess this will show changes based on animation, not useful for stills I guess but useful for anything that blends maps based on topology changes in time: wrinkles, holes, color changes.
There are some minor issues with IR which I have reported, but I'm sure they (or Ondra) can resolve them.
