I can 'OK Google' almost anything now.  If I ask Google to navigate me somewhere it used Google maps.

You need to fight against this otherwise convenience will win.  Not sure if you can add a plug-in to Google, or just have your own homescreen button that will listen for a destination.

It needs to be good though.  OK Google is so intuitive, it just knows what I mean.  They have way more data than you do, so a big ask...