The new battlefield is the real estate on your phone´s front page. FB + Messenger + Instagram + Whatsapp: 4 out of 16 icons, not bad.
What's to prevent an app like Authenticator from uploading its cryptographic seeds to Google's servers?
I was wondering why a company would invest resources into creating an app like Authenticator, which seems to have no obvious path toward monetization. But if the company who writes Authenticator can also spy on its users, then that might be the answer.
IMHO the real problem is the actual OS :/
Different Android-based operating systems come with different UIs, and installing a new home screen UI on any of them is as easy as installing Angry Birds.