One of the OS4 betatesters put this video of native P96 on his homepage. This is not an official OS4 demonstration, just one users machine. The picture quality is low, but it gives an idea of the speed. Check it out:
<a href=http://crisot.free.fr/os4/os4.avi target=_blank>http://crisot.free.fr/os4/os4.avi</a>