The problem is the interface. Voice commands and their responses are linear, one dimensional. It’s difficult to represent complex interaction within that scope. Think of all the investment that has gone into telephone based automated customer support. The best interface conceived so far is the dreaded phone tree. That’s essentially the same interface smart speakers are exposing.

The opportunity is to figure out how to better utilize the voice based medium. No one has done it yet. When they do, it will also likely improve the experience around screen readers and accessibility.