[caspianm]

One thing I really want to know is what data can apps access. Is it like most phone apps where my data in one app is secure if some random game would like to read it?

Do the apps or the users manage security choices like these?

They want the ease of use and security of a phone OS and app store, but they also don't want the data stuck in separate silos. I'm not sure if the idea is to have isolation between apps like iOS has or what.