Can't help but noticing it's yet another "me too" from MSFT. And a late one at that.
While I do have a few iOS devices, Siri: I've not yet found it useful in any way. One sure looks like a moron standing in a street shouting to their phone that just won't pick up their accent. And the one case where it would make sense: while driving a car - well the stupid thing doesn't answer in voice - it answers in text which you have to read - the one thing you should not do in such a use-case.
To me all of this is still as useful in real life as the talking parrot was that was included with my very first sound baster card: fun for an hour or two - then forgotten to never try again.
Even if one has a voice interface that really worked - the search and understanding of what we look for is still years from returning useful results in all cases.