Toshiba's R&D department has built as a successor to their larger ApriPoco household robots a cute little "ApriPetit". This guy stand 15 cm (5.9 inches) tall and follows along to conversations by moving its slug-like body and eyes in ways that resemble proper conversation was unveiled at ROBOMEC 2012.
The robot is part of Toshiba's "Advanced Personal Robots with Intelligence" project and is not yet for sale.
It's so small that you can easily hold it in the palm of your hand, so Toshiba is describing it as a portable robotic interface. And, it is designed to help older folks with their daily chores.
The ApriPetit's enormous eyes contain functional stereo cameras, which can find and recognize faces and determine how close they are. The ApriPoco used a distance sensor to help determine a person's proximity, but this has not yet been implemented in ApriPetit (perhaps due to its compact form).
It can banter with you using a combination of speech recognition and text-to-speech software. Although the technology hasn't been commercialized, the prototypes have found their way into a number of research labs.
Other companies have explored similar devices, such as NEC's PaPeRo-mini and RayTron's Chapit.
Toshiba is considering possible applications including supplying the robot to cloud service providers, allowing various services to be piped to the home through the robot.