|iOS 8 ready to be downloaded|
I suggest that you wait with upgrading your iCloud to iCloud Drive. You can't use the full futures of the iCloud Drive until the release of OS X Yosemite or the release of the Windows application for it.
If you do immediately upgrade to iCloud Drive, you won't be able to synchronies your files on the apps like Number, Keynote and Pages. This is because they are still an "old" iCloud file and not yet ready for usage with the new iCloud Drive.
I hope that the release of iOS 8 gives you no trouble (with the release of iOS 7 in the back of my head), so enjoy. Let me know what you think once you have it on your iOS device.
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