For example: closed captioning on multiple TVs or in loud rooms; curb cuts for people pushing strollers, walking bicycles, using walkers, or pushing shopping carts. Not the intended purpose, but making things more accessible made them more better for everyone.

I'm not super up on the history of computer dictation and voice control but I'm pretty sure some of that was driven for use by people with mobility limits that kept them from using a keyboard and mouse. Now we all have voice controlled virtual assistants.