I’m curious about this as well. I’m completely within the Apple ecosystem for personal use (though I have a Dell desktop that I use once in a great while–I only have a MacBook Air for regular computing and sometimes prefer the feel of a desktop), but I sometimes access iCloud.com from work. Based on what I’ve read here, I should be fine with iCloud Keychain. Unfortunately, I’m not familiar with the capabilities of Keychain. Can it store the same sort of data as 1Password (credit card, banking, etc.)? Although I’ve been an iPhone user since 2009, last fall I bought my MacBook Air and am trying to get familiar with all the Apple ecosystem syncing, as well as just regular use. (I have become an Apple devotee with all the seamless interaction in the ecosystem!)