We’ve always safeguarded your data with an integrated stack of world-class secure infrastructure and technology, delivering end-to-end protection in a way that only Google can
This is weaselly even by marketing standards. Most of Google's services are still not end-to-end encrypted, and none of them were until recently. Oh, but they said "end-to-end protection", which means absolutely nothing, so I guess it's not technically a bald-faced lie.
Anyway, aside from their attempt to rewrite history, it sounds a lot like Apple's promise with their secure and verifiable AI servers. Google's blog post references Project Oak, which I'm not intimately familiar with.
I'm still skeptical of these supposedly-private cloud platforms, but I have a lot of reading to do if I want to develop an informed opinion.