I am also an Android user. This feature isn't something I need.
Like I said in my original post, it probably isn't how it seems. The fact remains though that Apple saw an opportunity with voice commands on its mobile platform. Google may have been working on voice technology before hand but was it for Android?
Google is doing great on other things. Chrome, Chromebooks (maybe released a few years too early but they took a risk on it) and driverless cars.
With Android, I have yet to see it really innovate by itself. I should say that I do not follow Android development. I am just an Android user who casually looks at an iPhone from time to time to compare the two.
In my experience, it essentially looks the same as voice actions, except with a much higher success rate. The least socially intrusive action is whatever lets me transition back to the conversation the soonest, and voice actions win in terms of speed for a lot of use cases. Also, if you absolutely have to turn to your phone with someone else around, it's kind of courteous to telegraph exactly what you're doing.
If I "had to" interact with my phone in the middle of a conversation, it might be different, but that's a fringe case I very rarely encounter.
"Now searching for taco bears in Bell, Michigan"
Secondly, voice recognition and conversational AI is not a new product that was invented by Apple. You seem to overestimate the importance of Siri in terms of the originality it brings. It indeed seems awesome to have and interact with, I have not done that yet. I have an Android, and I am not even waiting for something similar because I find it unnecessary to have one and it might be intrusive to use in presence of others. So probably for the few who are like me, it is not a killer feature - not even close.