@Brian.Dean - The part with the reminder not reminding me on time brings back memories of Apple Maps. About the time Apple Maps come out, I had bought an iPhone. Because of those kinks in it, I used Google Maps instead. I never used Apple Maps because I lacked confidence in its accuracy and I was happy with Google Maps. My point here - sure it is new, but it has to be better than what is out there for people to switch.
And for the lack of "Hey Cortana" - that was removed from Android by design. I sort of understand their reasoning, as I experienced the "problem" this created. Right after I upgraded my laptop to Windows 10® I was trying out Cortana. "Hey Cortana" triggered Cortana on both my laptop, and my cell phone which was sitting nearby. A bit of an inconvenience, but not really. In fact, I find the voice command more useful on my phone than laptop.
I like the idea of Cortana for Android, as it may help my smartphone work with my laptop, even if I don't have a Windows phone. But it has to work (remind me on time) and be convenient to use (voice triggered on my phone).