Can this AI integration now mean that Siri can finally just read the wikipedia page of a topic when I am driving? Or can I finally have Siri add a stop at Mcdonalds on google maps during a road trip?

Adding a stop at McDonalds on Google Maps won't necessarily work unless Google provides the hooks to accomplish that.

But yes, it can give you information on a topic in a way the old Siri couldn't.

Isn’t the whole hope is that Google (and other app vendors) doesn’t even get a say at what’s possible through Siri.

All it takes is to expose application’s UI to the model, and let the model send actions. If a human can do it tapping on the screen, the machine should be able to do the same thing.

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