I don't think this would work. A big part of why ChromeOS is so simple is the Google services backing it. Without the unified login, automated backups, verified app store, and hardware certification ChromeOS wouldn't be the easy to use system that it is.
All the office were based on open source systems. DT wanted to make money mostly on their data plans + device management services. The project failed for one reason: Enterprise IT is the opposite of price sensitive. I had talks with a couple of CIOs who were interested in the idea, but realized that commiting to a solution that could slash their budgets by 80% would be career suicide.