The RU robot attracted a lot of interest as it rolled around the floor of a mock apartment at the recent SEK exhibition.
Produced by Dajin System, the RU has a built-in camera and can trundle around the house at the owner's remote command to check up on things.
Video from the camera is streamed across the network to either a Web browser or mobile phone Internet connection. There are various security sensors that can detect unauthorised entry, gas leaks or fires. It can even program your VCR.