Other sites have rumors and speculation. We have the TUAW braintrust. We put the question to you and let you have your go at it. Today's topic is iCloud. With so much to offer, what will its true killer feature be?

iCloud stands ready to revolutionize the way we think of cloud storage. It brings so many options to the table, it's hard to pick just one. So, of course, that's what we're going to ask you to do. Of all these features, which is going to truly change the Apple user experience most profoundly?

You tell us. Place your vote in this poll and then join in the comments with all your iCloud predictions.

What is iCloud's killer feature?
Data Backup: Your content stored and backed up passively, off site, and without any extra work on your part1698 (27.6%)
Music Match: All your music whenever and wherever you want it1136 (18.5%)
Photo Stream: Download photos to all your devices at once432 (7.0%)
Contacts, Calendar, and Mail sync: Your info, up to date and ubiquitous894 (14.5%)
State synchronization for iBooks and other apps: Pick up on one device where you left off on another546 (8.9%)
iWork (and other app) integration: It's about your documents, not the app or device used to access it499 (8.1%)
Dropbox Replacement: Moving data from here to there, moving data everywhere766 (12.5%)
Something else, I'll tell you in the comments178 (2.9%)

This article was originally published on Tuaw.