Microsoft, where are you? Cortana on a device that is similar to the chip Master Chief has would be incredibly popular, and it done right could also be just as

Microsoft, where are you? Cortana on a device that is similar to the chip Master Chief has would be incredibly popular, and it done right could also be just as popular. Especially since Cortana is on every platform and completely agnostic unlike Google Home and Echo. Give it the same extensible API as Cortana has on Windows 10, etc and it could be a home run. Don't let Google and Amazon eat your lunch here. I do wonder though how Google/Microsoft/Apple will handle there being multiple instances of their devices able to take commands. So if I say "Hey Cortana" or "Ok Google" will each device have to sort of communicate with the other to only activate the one that is closest?