There are, indeed, new kinds of domains on the way.
Every domain name is composed of two parts.
Historically, the number of top-level domains has been limited to those that were originally doled out at the beginning of the domain name system. As you can see, top-level domains have been designed to help people understand the nature of the organization that holds the name. Since each domain name must be unique, this has produced intense competition for names. The organization responsible for approving any new top-level domains is the Internet Corporation For Assigned Names and Numbers. These new top-level domains are something of a mixed bag.