Next up in Canon's new camera frenzy is the Digital IXUS 860 IS, successor to the IXUS 850 IS. If you live in North America that sentence should read: 'Next up in Canon's new camera frenzy is the SD 870 IS Digital ELPH, successor to the SD800 IS'. Confused yet? You should be. The new model shares its predecessor's 28-105mm wideangle zoom but ups the sensor resolution to 8.0MP and the screen size to a massive 3.0" (it almost fills the rear of the camera).