According to this article by Alan Dunn on Quartz, we are almost out of good domain names. I'd agree but, you can purchase domain names from companies and individuals just at a premium. This article uncovers a few domains that you think would have been purchased with by larger entities and the real take away is “The thing about domain names is that they have become a precious commodity in their own right,” says David Taylor, a partner at Hogan Lovells and domain-name panelist for the World Intellectual Property Organization.
Good domain names are assets and I wouldn't put much stock in other extensions, it always drives traffic to the dot com version of the name. Read the full article here.