Robot vacuum cleaners are starting to make greater use of computer
vision, like self-driving cars.  Here's an informative video that
compares laser-based vs. vision-based vacuums and explains how they
work:

https://www.youtube.com/watch?v=5O8VmDiab3w

When the robot builds a map of the room and then uses that map to plan
an efficient vacuuming path, we're seeing Big Idea 2 (representation and
reasoning) in action.

-- Dave