I imagine it's more a bundling of services that already exist. You could achieve much of the "move to iOS" functionality through using Google apps on iOS - Goog

I imagine it's more a bundling of services that already exist. You could achieve much of the "move to iOS" functionality through using Google apps on iOS - Google Photos, Contacts, Chrome, and so on will gladly accept your local/iCloud data and upload it to a Google account. Apple doesn't make iOS app analogs on Android so you need to actually convert from Google data to Apple data explicitly.