The forgotten '80s home robot trend

The Gemini was the most technically advanced of the personal robots available in 1985, with features that remain impressive today. It not only spoke but took voice commands. It was self-charging, and retained a map of your home for navigation purposes, a feature that was only introduced into the Roomba line in 2015, 13 years and 5 generations after its introduction. It could sing with synthesized piano accompaniment, recite poetry, and connect to early online services like CompuServe.

That's quite amazing.