>Huang said he expects mirrors could eventually become smart displays
My first reaction was "No! Wing mirrors are effectively a consumable, like tyres or brake pads", since on the lanes around here they don't last indefinitely.
However, if one were to replace a £20 mirror with a £100 display, it wouldn't have to be placed outside the vehicle. There would be other engineering challenges too - such as visibility in bright sunlight - but they can be overcome (e.g, by using a honeycomb filter aligned to the driver's eyes).