"I'm sorry Dave, I'm afraid I can't do that."
Sci-fi films/tv have had people talking to computers since the start but my interaction with computers began with almost unresponsive flat keyboards (ZX81) which progressed to rubber ones (Spectrum) then 'proper' keyboards (BBC Micros), then mice, then touchpads & touchscreens (not forgetting joysticks/joypads for gaming), which could explain why it always feels weird talking to my phone unless I'm actually making a call.
Are those futurists still predicting everyone interacting with computers through speech? Because for many uses it's far simpler/quicker/easier to press buttons/screens than to talk to the device.