I personally would not trust an application that operates through Google. The application could give them copies of all my work - much as they brazenly keep and parse the email of who foolishly submit to their webmail.

As the web browser becomes the ubitquitous interface of choice (perhaps merely by default), the O/S becomes irrelevant. Linux distributions need only have a browser to be totally user friendly - and the free wordprocessors, spreadsheets, and everything else that the open-source philosphy has already produce are first quality items at the best possible price: free.

And your business remains your business.