I'm 99% sure that the R4 robocop is exactly the same as the R2. Also in your opinion should 1.66:1 movies be anamorphic? My answer is a solid no. I know that you do get more resolution with the anamorphic, however it crops part of the frame! You are locked into viewing it at 16:9 (1.78:1) if you use the full resolution, and on PC's there's no way to get it to show you the full frame (because the software just assumes that because it's anamorphic the area outside the 16:9 anamorphic is useless, and discards that picture information). Which means if you want to watch it in 1.66:1 - like it is supposed to be presented, you have to set your DVD player to 4x3 output and then it looks awful because it's throwing away every fifth line!
It would be tempting to remaster my anamorphic 1.66:1 DVD's onto non-anamorphic DVD-R's. Which is illegal, but at least then I could sit back and watch them in the correct frame without that jagged look of watching anamorphic titles non-anamorphically.