The cloud computing forum, at the time of writing this, has 26 posts in it. Even the smaller "main" forums such as SEO have near about 5000 posts minimum. It's really not worth having it as a main forum.
When it picks up I'm sure someone will look into making it a main forum; but until then it really should stay as a sub-forum.
While dedicated servers are best for me. I am seeing more and more companies turning to cloud hosting. The problem with it is that so many of us do not fully understand cloud technology.