It's kind of a shame. In my opinion, the microphone icon makes for the best user experience because there is no ambiguity about what it is going to do when you

It's kind of a shame. In my opinion, the microphone icon makes for the best user experience because there is no ambiguity about what it is going to do when you press it. With a talk bubble or a picture of a robotic head you can guess, but it is not immediately clear. It's interesting because it seems like Apple wants to avoid confusion for users thinking the app is Siri by hurting the user experience in each of these apps.