The VPL-VW70 truly does a really good job, it manages to reveal lots of very dark details. Almost all the darkest details are there, but, may be so dark, that they are difficult to see when just enjoying content.
No issue at all, with the shadow detail at all!
The image below is another good one for looking at shadow details, and can be found on most recent reviews. Look to the details in the dark area in the upper right, and, if comparing to other projectors, whether that area is more or less vibrant. Sometimes the details may be there, but the area can look pretty flat.