Say what you want about Google, but as an Apple user, I can say that if Google want to do this Voice Assistant, they will do it much much better than Siri.
Let's be honest, Android OS has this voice recognition service long before Siri or even mere VoiceOver or VoiceCommand on iOS. It ma be suck or whatever, but obviously iOS is not the first one to have it. Period
And then think about this:
Google is the best search engine on earth, and services like Siri basically is a voice activated search engine.
You call Siri, you speak, it captures your voice, it search the Internet (mostly on Apple's server) and Siri give you the most relevant result, either it's a dictated text feedback, or non dictated data (weather, math operation result etc)
And you know what? Even Apple still needs Google for its web operation. What is the default search engine on Safari Mobile? or even Safari? .. What is the app used for mapping on iOS?
So if Google really want to do it, although sounds harsh for you fanboys, Google would do it better. It has massive database, it knows basically everything going on this earth, and then some 😀
Let's just say Apple can't be the best at everything, if Apple want Siri compete with Google, they better start their own search engine business, which actually really really reaaaalllyy late. 😀