I genuinely hope they won't do that. Imo, they should at least put it behind a toggle in settings, so that i can keep using the "hey siri" trigger phrase.
I much prefer the "hey siri" and "ok google" triggers, as opposed to Amazon's "alexa" trigger. The latter approach makes it difficult to talk about it or even use that word without unintentionally triggering the device. Meanwhile, I had exactly zero unintentional triggers with Google Assistant or Siri.
And yes, I know that Amazon's echo devices allow in settings to switch to one of the other 5 or so trigger words, like "echo" or "computer". But they all suffer from the same issue of making it difficult to use those words in a conversation without accidentally triggering the device.