Lion has introduced a set of OS-level technologies and changes, that can finally make the ‘Apple Cloud Drive’ a reality – and with that, the Apple Cloud Laptop. In the (hypothetical) Cloud Drive, without pervasive Auto-Save, data pushes would need to be on-demand, when files are saved by the user explicitly. With this new design, if the applications support Auto-Save, the Cloud Sync can happen constantly, whenever connected, and whenever convenient; not when required, and in a hurry (imagine saving a large file with a lot of changes and hoping, praying that it gets sync’d up to the Cloud for backup before anything bad happens). via
