It can do this because it is a bot, or software robot, a program that can interact with people.

BBC: Hand on keyboard

I.e. the dual-cameras on the HOM-BOT can show you where the robot is, and mapping presents a display of its path through the house.

FORBES: LG Event At CES Liveblog: Dual-Core Smartphones, 3-D TVs, No Tablets

While domesticated robots are becoming a ( frighteningly) common inclusion in techno-friendly homes, Korean 'bot manufacturer ED has a home-ready robot that sports a plethora of communication venues including ZigBee and RFID.

ENGADGET: ED unveils programmable, home-serving U-ROBO bot with RFID