The re-entry image below, is a tough shadow detail test. Projectors with weak black levels and average shadow detail ability tend to generate an image where much of the right side of earth, looks to have that flat, lacking in detail look. All projectors pick up some of the brighter features on the right side, while better ones, pick up a lot more and usually have richer blacks as well.
On the left, is the PLV-Z4000, the middle, the Epson Home Cinema 8500UB, and on the right, the Vivitek H5080, a more expensive single chip DLP projector recently reviewed.. The Sanyo outperforms the Epson by a bit, and holds its own with others including the Panasonic.