Good data image quality. Since some game screens share the same characteristics as data screens, it is important for a game projector to handle data images well. The GT750E does well enough on this score so you can use it as a data projector.
On data screens, colors were a bit dark in terms of a hue saturation brightness color model, but they were fully saturated and suitably eye-catching. Yellow was a touch mustard color, but no more so than with most DLP projectors. Note too that text was crisp and readable down to the smallest sizes we test with. The text was easy to read even in an assortment of color combinations with color text on color backgrounds.
Good video image quality. The GT750E's video quality is easily a match for some low-end home theater projectors and better than you'll get from most data projectors. In my tests, it handled skin tones well and did an acceptable job with shadow detail. I saw a slight loss of detail in scenes that tend to bring out the problem because they're not lit well, but poor lighting (or, rather, it's digital equivalent) is an issue you're not likely to see in games.
I saw some moderately noticeable noise in large areas like the sky or a solid blank wall, but no more than with most inexpensive home theater projectors. I didn't see any motion artifacts or posterization (shading changing suddenly where it should change gradually). More generally, the GT750E's video quality is good enough that I'd be comfortable using it to watch a full-length movie.
Good Game image quality. Good image quality for both data and video almost necessarily translates to good image quality for games, but to confirm it I took a look at both Batman: Arkham Asylum and MLB 10 The Show. The projector handled both the dark Batman scenes and the bright baseball scenes without any problems, and also without the noise I saw with video.
Short throw lens. Thanks to its short throw lens, the GT750E can easily throw a large image in a tight space. For my tests, I measured a roughly 90" diagonal image at 720p at just 57" from the screen. That puts the projector close enough to the screen to let you sit behind it, not have to worry about shadows, and still have an image that fills most of your field of vision.
Fully 3D-ready. The GT750E is one of the few inexpensive projectors with HDMI 1.4a ports, so it can accept a 3D signal directly from a PlayStation 3, a FIOS box, or the equivalent. I tested it with 3D games, Blu-ray discs, and HBO's 3D content on FIOS and it worked as promised, with no problems and with no noticeable crosstalk.
Portable. At 3.8" x 12.8" x 9.2" and 6.6 pounds, the GT750E is small enough to carry easily. If you want to use it occasionally as a data projector for business presentations you may want to get a second carrying case. The included black backpack with red and gray highlights doesn't look businesslike, especially with the words Game Time showing clearly in large letters.
Good quality audio. The GT750E's sound system is far better than what you'll find in most projectors its size. In fact, the two 5-watt speakers offer stereo at high enough volume and high enough quality to match a typical large screen TV, which means you can do without an external sound system if you like.