I posted my first P5 image above and I am truely impressed with CL. However, I do not think P4 will disappear for the following reasons. 1. There are some artists that still use P3 in their bryce renders because P3 is sufficient for what they do. 2. I did notice that the interface responds faster in P4. My 1.4 athelon is fine with P4, but I'm gonna upgrade the machine with P5 now. I think there's a lot of folks out there who just don't have the bucks or interest in upgrading hardware. 3. There's still a lot of free stuff and merchant stuff for P4 and doubtless the price of P4 will reduce over time. More folks will be drawn in. 4. I agree with the comment above on easier entry level use of P4.