Maybe they don't but I don't see them doing anything major on the iOS side either. Both platforms are quite mature by now anyway.
(And Apple was never about revolutionary new designs and jumps. Back in the day of the iPod and early MBPs etc, we cheered and waited anxiously for at best incremental changes -- now it has USB, now it has a different touch wheel, now it has a color screen, now it has wifi, now it does video, etc, year over year).
>And as you point out, it's something that doesn't even make all that much sense on the Mac.
Yes, but people (and pundits) have been asking for it all the same to appear on the Mac anyway.
And "talking to your computer" has been a thing from the times of 50's sci-fi stories even.
Curious here - can you give some examples? Siri seems to work better (on friends' devices) than "OK Google" on my Moto X.
But it also indicates that Apple isn't really designing for the Mac as the author points out.
I mean, Siri is the biggest feature Apple is touting for Sierra (http://www.apple.com/macos/sierra/). And as you point out, it's something that doesn't even make all that much sense on the Mac.