Ok, I've finally compiled and tested nui. Honestly, I was quite disappointed. Not by its look or features (they look very beautiful&promising), but by its speed. Why is it SO slow? Of course, I run very old hardware, (celeron 415, GeForce 2 MX400), but even it has absolutely no problem showing quite advanced programs. For example, Blender and its OpenGL GUI (www.blender.org) run very smoothly and ultra-fast. Maybe you use some vertex&pixel programs which are unsupported on GeForce2? If it is so, is there a way to turn their use off, to get simpler but faster gui? (nui test performs at about one frame per 5 or 10 seconds).
So, can I have any hope of improving performance on my old hardware or is nui totally oriented on high-end machines? P.S. I first thought there was a problem that it didn't find the opengl hardware, but it correctly writes name of my card&driver in the console.