I also refuse to use "the cloud" for productivity. The only type of OS that can be dependable and trustworthy is the traditional system, which must be installed on the HDD. If the cloud servers go down, so do the people using these programs. If the user gets disconnected from the internet, they may as well be disconnected from any power sources. To make matters worse, imagine trying to run a cloud os with slow, internet, that comes bundled with data caps.
Let's not forget to mention the simple fact that the cloud is almost guaranteed to have malicious features, such as DRM (which will have the same functionality as a traditional rootkit), spyware, limited functionality for some users (that is, the poor who can't afford "nicer" features), and other goodies that have made the tech industry an object of ridicule among it's own customers.