In reality the term really is a fancy way to describe a lot of network presentations capabilities. “Cloud” just makes it sound sexier. Let’s say that cloud or advanced network presentations can be a powerful tool whether or not there’s a cloud projector on the other end. A teacher could use an interactive cloud projector in their classroom, so that a student at home with the flu can see all the projecting on their home monitor or laptop, assuming it too has the necessary communications skills.
Cloud supporting projectors are typically interactive, work with tablets as well as computers, and are some of the more expensive options out there.