Okay, so this function is perhaps the most practically useless, but also the most fun: the LineFORM can be used as an "expressive cord" that wiggles when data (presumably) is transmitted down it.
Other uses in the video include a sort of semi-flexible exoskeleton that can remember and replay specific movements and a "dynamic ruler" that can transform between different shapes. Of course, this is just a concept from MIT, and quite an unwieldy-looking one at that, but it's fun to think of a single shape-shifting input being used around the house for multiple tasks. Just don't imagine it getting hacked and strangling you in the night.