No, it's because big tech has taken control of our data and locked it all down so we don't have control over it. AI browser automation is going to blow open all these militarized containers that use our own data and networks against us with the fig leaf of supposed security. I'm looking forward to the revival of personal data mashups like the old Yahoo Pipes.
There's a million ways. Just off the top of my head: unified calendars, contacts and messaging across Google, Facebook, Microsoft, Apple, etc. The agent figures out which platform to go to and sends the message without you caring about the underlying platform.
