I'm not sold yet, it's making some incredibly bold claims. I'm aware of point cloud data models from back when it was included in the 3D Mark '01 benchmark (the rotating horse statue, the test was called point sprites http://www.ixbt.com/video/images/3dmark2001/gf3-sprites.jpg ), and found it an oddity at the time, not all that visually appealing and certainly not as a believable modelling method. It's not raytracing, although it does bare a lot of similarities.
I'll be keeping a sceptical eye and an open mind on this one.
Anyway, here's their website http://unlimiteddetailtechnology.com/
Edit: Thinking about it, it's biggest downfall will occur when physics are involved. For a static scene it's ideal, but to get the branches of the trees to blow in the wind, or to achieve any kind of real time environmental change beyond lighting would likely cause some serious difficulties.