Contrast. The Pro Cinema G6900 is rated at 5,000:1 contrast. While dynamic range in bright scenes is plenty strong, scenes heavy in shadows and mid-tones tend to lack snap due to the projector's lackluster black level, and the greater the ambient light the more the picture is compromised. Pairing the Pro Cinema G6900 with a contrast-enhancing screen material is an excellent way to mitigate this problem.
Zoom lens light loss. Almost all zoom lenses reduce the amount of light that reaches the screen as move toward the telephoto end of the range, and long zoom lenses (those with zoom ratios at or above 1.5:1) can reduce light output significantly. Using the Pro Cinema G6900's Standard Zoom lens, light output is reduced by 35% at maximum telephoto (the smallest image for a given throw distance). In other words, maximum light output in Dynamic mode falls to 3260 lumens. That's enough of a drop that you might want to consider mounting the projector closer to the screen or using the next lens in the lineup rather than trying to make do with the Standard Zoom.
Input lag. With 92.3 ms (around five and a half frames) of input lag using Fine processing, film and video may have visible audio delay if a correction circuit is not used. Fast processing is an option, reducing delay to 40 ms, but that setting also decreases image resolution. We would not recommend the Pro Cinema G6900 for gamers who need super-fast response times, but casual games should still be playable as long as exact timing isn't a requirement.
WUXGA. WUXGA is a 16:10 version of 1080p, just as WXGA was a 16:10 version of 720p. When viewing 16:9 film and video, you'll have small black bars at the top and bottom of your image. On the other hand, this does allow you to connect a computer or other data source and use the projector's full WUXGA resolution.
Black case color. The Pro Cinema G6900 comes only in black. That may be what you want, but in rooms where ambient light is normally present you may prefer white. If so, Epson has another projector, the PowerLite Pro G6750WU, which comes in a white case and is virtually identical to the Pro Cinema G6900 in design and performance -- the G6750WU has the same 6,000 lumen output, 5,000:1 contrast, excellent color, and WUXGA native resolution. It features the same automatic iris and frame interpolation system, and it has the same lensing options.
There are two differences between the G6900 and the G6750WU. The G6750WU lacks advanced edge blending, and it lacks HD-SDI, making it more difficult to connect some professional video equipment. If neither of those things are relevant for your needs and you prefer a white case, the G6750WU may be the better option for you. One additional benefit is that the G6750WU costs $500 less than the G6900.
Taken as a whole, the Pro Cinema G6900 is an impressive projector. High light output and great color performance create a sparkling, commanding image, even in rooms with lots of ambient light. The connection panel is packed tight with digital connections ranging from HDMI to DisplayPort to HDBaseT, allowing the Pro Cinema G6900 to connect to almost any device imaginable. The Standard Zoom lens and extensive lens shift make the projector easy to install, and interchangeable lenses ensure that even those who can't use the Standard Zoom can still fit the projector into their homes.
All in all, the Epson Pro Cinema G6900 is a powerful, highly capable projector that brings the big-screen experience to your living room in a way that was not previously possible. Video and film can now be displayed on very large screens regardless of ambient light. When paired with an ambient light rejecting screen surface, the Pro Cinema G6900 becomes even more capable, and the end result looks like the biggest television you'll ever own. At $6,499, the Pro Cinema G6900 is a great way to bring the big screen out of the dark.