Apple just announced on stage at WWDC iCloud Drive, its cloud storage syncing system that sounds sneakily similar to Dropbox. iCloud Drive syncs your stuff across all your devices, and across all platforms -- even Windows.
Documents are now accessible from the Finder, and syncing is automatic. But the main takeaway here is that iCloud is sort of mimicking what Dropbox and Google Drive and whatnot already do automatically.
Also worth mentioning is Mail Drop, which sends large files through iCloud instead of getting bounced back, up to 5GB. Pretty useful stuff.
More Breaking Apple WWDC 2014 News
• Apple's HomeKit Is An iPhone-Powered Universe Of Gadgets • iOS Health: All The Important Data About Your Body In One Place • Apple Is Turning Your Mac Into A Phone • Apple's iCloud Drive Takes A Swing At Dropbox