Microsoft and Google’s new AI sales pitches: We’re your last line of defense against your scatterbrained self

Would you trust an on-device AI to listen to your calls to stop scams in progress or to record all of your computing activity so you never forget any of it? 

Google and Microsoft have spent the last few weeks unspooling enormous ambitions for artificial intelligence, but their smallest-scale showings of this technology—what they call on-device AI, but which you can also think of as offline or cloud-free AI—look the most interesting. And unsettling.