Photographers seem to agree that greater MP count is a myth in photography, even though many consumers believe that a higher megapixel count will result in better pictures. There are other components of a camera besides MP count that create a better picture. Last but not least, factors such as lighting and the way that you shoot the photo makes the largest difference.
All said, if the Incredible has a 4.3 screen instead of a 3.7 screen at the sacrafice of an 8MP camera, I would find 5MP more than good enough to shoot good pics. The lower MP count would not stop me for a second from buying the Incredible.