why is that these point clouds can't be easily animated, are the data structures that allow for the searching too difficult to update once they've been built or is there just too much data to process?
It would be interesting to see if anyone can create a hybrid of point-cloud scene + polygon animation... should be enough for most shooters. (Outcast apparently had something like that, but that was pre-"nice graphics")
Although I'm pretty sure point sprites and voxels are two different things.