The voice recognition (given decent hardware and a fairly vanilla accent) is quite good. The problem is being able to integrate, present options, learn preferences, etc. even to the degree of that subpar assistant who you only keep paying because they're the daughter of your mother's best friend.

You want to be able to give a few parameters for a trip you're taking and get some choices back. But, as you say, that's far more about "intelligence" than the type of input.