O.K. here's my take on the new JVCs and 3D and how they compare to DLP and past offerings from Epson. I haven't seen 3D with the Epson LS10000 so I can't comment about its 3D performance.
As a point of reference here are the 3D projectors I currently own and regularly use -- Epson 6010, Epson 6020, Mits 7900, Mits 8000, Sharp 30000, JVC RS-400 and JVC RS-500.
I looked at certain scenes that are difficult for non-DLP projectors to handle and then compared how the Epson and JVC projectors fared with these particular scenes (the DLPs were used as a reference).
For comparison purposes I've broken "ghosting" into two categories: (1) foreground ghosting (FG) and (2) background ghosting (BG). First, let me explain the differences as I see them. Foreground ghosting is the type of ghosting that most recognize as "ghosting" and it is the most obvious. The pictures Zombie has posted in the past are great examples of foreground ghosting and basically show halos or a double image around the main objects in a scene. Now background ghosting is less obvious because our eyes tend to go to the main objects i.e. people in conversation with one another or something designed to attract our attention (what I refer to as foreground). The objects in the background are of secondary importance; however, how they are handled from a 3D perspective is very important to the overall quality of the 3D. BG ghosting is more subtle than FG ghosting and shows up as more of a smudge or loss of definition with respect to a background object, which makes things look out of focus as if there is another layer obstructing its clarity. I believe it is actually contamination from the other channel which is overlaying objects in the background thus interfering with the background's clarity. The projector may be handling the foreground objects well from a ghosting perspective but contemporaneously failing miserably with the background objects. DLPs are the reference when it comes to both foreground and background ghosting and it is very helpful to watch particular scenes in 3D with a DLP since it establishes what we should be seeing or not seeing.
What I have found is that the new JVCs handle both types of ghosting very well (luckily for me since I own two of them). I have looked for both foreground and background ghosting with the JVCs and only found minor foreground ghosting and have not to date, noticed any background ghosting. Background objects retain their clarity.
What I find interesting is how the Epson projectors handle ghosting as a whole. They have a very good reputation for 3D based, I believe, largely on how they handle the much more obvious foreground ghosting. In this area they are very good. However, when it comes to background ghosting things become much more problematic. As I've said I've watched certain 3D scenes over and over again with my DLPs, the JVCs and the Epson projectors and I'm constantly reminded when I watch these scenes just how good the Epson projectors are at handling foreground objects and how bad they are at handling background objects (unfortunately for me since I own two of them). I have no idea why this is but I'm constantly seeing it and when I do I find myself at a loss as to why the 3D background objects are handled so poorly while at the same time the foreground objects mostly look good.
I need to find away to capture what I'm seeing digitally and post some pictures. Once pointed out background ghosting will become much more evident and you will understand some of my 3D frustration and if you happen to own an Epson 6010 or 6020 you will probably despise me for ruining 3D for you.