According to The Guardian, Bill Gates envisions Rosie the companionbot...
An office worker checks her home-gadget webpage from her work computer. The tasks she set for her home robots in the morning have all been completed: washing and ironing, vacuuming the lounge and mowing the lawn.
She orders dinner from the kitchen chefbot - sushi today, using a recipe from a Japanese website - then checks her elderly mother's house. The companionbot has given mum her medicine and helped her out of bed and into a chair.
As the article points out, it's thinking like this that leads to innovation, however solutions are found in practicality:
Mr Gates thinks the plunging cost of computer memory and components will contribute to advances. But he believes that, like the early computer industry, robot developers need a common set of programming tools to solve problems such as dealing with numerous sources of information simultaneously. He has set up a team to solve these problems.
Read Bill's article "A Robot in Every Home" in the Scientific American, which is very practical.