Frame Interpolation
The Epson 3010e offers basic frame interpolation, including 24 to 48fps (2:2). Not to be confused with CFI - creative frame interpolation, which tends to appear on a number of projectors around $2000 and up.
USB Slideshow
The Epson Home Cinema 3010 offers a player for showing images and other content off of USB thumb drives, and other USB devices
Built in Audio
The Home Cinema 3010e's got a pair of 10 watt speakers. No deep bass, but pretty respectable for those sports gatherings, and your backyard movie shows. Of course, if you have a surround sound system, fire it up, but not bad in a pinch.
That's the short list of features. The two Epson projectors share a 1.6:1 manual zoom lens, keystone correction (but no lens shift), a full featured remote control, HDMI-Link for controlling other HDMI-Link