Why is a Google Drive so important to some people? Who cares! What would be the business benefit to Google? With Gmail, Search, Froogle and almost every other service offering, Google benefits by having more eyeballs for it's advertising engine. Providing a free online storage service is costly and opens up Google to litigation should a users "really important" file get lost due to a service failure.
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If MacUser's Aaron Freedman's analysis is correct soon working from home will get a lot easier for me. Aaron suggests that soon Google will start offering on-line storage similar to Box.net and iDisk. Some enterprising hacks have already found ways to use simple Gmail accounts to accomplish the same thing but an official Google offering would be extremely popular.
Google already has some of this in place with the Google Browser Sync extension for Firefox. I have been using this extension for several weeks not and it works seamlessly across my browsing sessions from home and work. The extension continuously syncs my including bookmarks and saved passwords across all the computers I use. It can also sync browsing history and cookies but I see no reason to do so.
Google truly is making it easier to live my on-line life complete immersed in the Google operating system.