"Hey Siri"'s increasing presence in Apple's lineup is very problematic, at least with it's current implementation, especially with the wildly varying capabilities between devices.

The HomePod is very greedy with Hey Siri, even for things that it can't handle. I'll be in my living room and try to "Hey Siri" something to my phone, and my HomePod in the kitchen will somehow here me, take the request, and then fail because it's incapable to doing it. Throwing a Mac into the equation just makes things harder.