Portable. At only six pounds, the W770ST might not be light enough for a businessperson who's constantly on the road, but it's more than portable enough to lug over to a friend's house for games or sports viewing. The projector's included carrying case feels sturdy, while the onboard speaker provides sound output when no other option is available.
Short throw. The W770ST's short throw lens makes it ideal for setup in small rooms. The projector can create a 60" image from a little over three feet of throw distance. This allows it to be placed on a coffee table in the front of the room, rather than the middle of the room, thereby giving the audience some extra space in which to move around.
Full HDMI 3D. While the W770ST isn't a 1080p projector and therefore can't truly be called "full HD 3D," it is completely compatible with 3D transmission formats outlined in the HDMI 1.4 specification. In other words, you can easily hook up a Blu-ray player or set-top box and watch 3D content.
The W770ST uses DLP Link for glasses synchronization, so all you need to do is buy some 144Hz glasses and hook up a source. There are a wide variety of 144Hz glasses available, and some cost as little as $30 per pair.
SmartEco. The W770ST uses SmartEco to boost contrast and reduce power usage. SmartEco is a third lamp setting (the other two are Normal and Eco) which interprets the brightness of the content on screen and then adjusts lamp power to an appropriate level. This has the effect of making highlights brighter in bright scenes and shadows deeper in dark scenes while also reducing power consumption. Unlike previous implementations of lamp-based brightness control, SmartEco has no noticeable effect on fan noise.
Onboard sound. A 10W mono speaker is the W770ST's answer to mobile, no-hassle sound. This speaker is powerful enough to accommodate small audiences of no more than 4-6 people in quiet rooms, and is more than loud enough to be heard over the projector's fan noise. In 3D mode, when fan noise is higher, you may have to increase speaker volume to maximum in order to compensate.
Long lamp life. The W770ST's 210W lamp is expected to last up to 4,000 hours at full power or 5,000 hours in Eco-mode. However, SmartEco mode can extend lamp life up to 6,500 hours, though this also depends on what kind of content you watch.