We'll probably learn more about the mystery checkbox at today's Google I/O keynote
Well here's an interesting development. Head to the Android sync options for your Google account right now and you'll probably see a new checkbox sitting up top for 'App Data' sync. The new setting seems to have appeared overnight for most people, and we're currently seeing it on all our devices.
What exactly this new sync setting does remains a bit of a mystery, but with the Google I/O keynote due to take place today, chances are we'll find out sooner rather than later. One possibility might be saved-game synchronization through the rumored Google Play Games service, however 'App Data' sounds a bit broader in scope. With just five hours to go until the keynote, at least we shouldn't have long to wait before we find out more.
What's more, the Google Play Store app itself is also being updated on some handsets, with some folks reporting minor visual changes in the UI.
Chances are these won't be the only updates we see from Google today, so stay tuned for our live coverage of the Google I/O keynote, which kicks off at noon EDT.
Update: Reports from the Android Central forums reveal another new checkbox to sync "People Details" which is apparently separate from "Contacts."