PS, let us wait for the reviews, but I'm going to bet Epson is brighter in 3D than optoma based on literature and previews. The real question will be ghosting/crosstalk.
"All of the Epson projectors sport Epson’s new 480hz panels, which per Epson, is how they are able to offer the brightest 3D home projectors to date (assuming you ignore $70,000 Runco projectors, etc.)"
Optoma HD33 lumens:
"For a family room type environment and 3D, while also great that the HD33 claims plenty of lumens, it came up well short of claim. That still makes it rather bright in "best mode" but, it's only slightly brighter than the average projector at its brightest, a far cry from the 1800 lumens claimed, which really would have been impressive. More on this later, let's just say we would have loved to have seen something like 1600 hundred of those 1800 claimed, but almost 1200 lumens was it.
Overall, 3D looked rather good. Brightness can be a minor limitation, depending on your screen. This projector, though has generally not looked dim, during viewing in my rooms. It is a bit brighter than any of the previous 3D projectors to roll through here, but for the big LG CF3D. Most of the rest are fooling around in the 600 to 1000 lumens maximum, so very thin when it comes to 3D."
Comment from Art on pre-revision epson 3010 vs optoma hd33:
"Terrill, just a few more days…out of the box color is pretty good. Mike just calibrated it, am firing it up soon. It’s bright. Significantly brighter than the Optoma HD33. I’ve taken side by side images for the review. -art"
Let's see how it turns out in 3D, that is a general statement. So even though the spec sheets say one thing, you never know how the lumens finalize. Panasonic is one to hit their marks, Epson does normally as well. Art did mention earlier the epson had some cross talking in his preliminary showing, and needed some work - but something got revised, who knows what.