Well, Google (GOOG) (GOOGL) has taken the lead with the .XYZ domain, by registering ABC.XYZ. Why ABC you might ask?
Google is creating a new parent company called Alphabet and will become a publicly traded entity. According to Larry Page on the Alphabet website:
"Alphabet Inc. will replace Google Inc. as the publicly-traded entity and all shares of Google will automatically convert into the same number of shares of Alphabet, with all of the same rights. Google will become a wholly-owned subsidiary of Alphabet. Our two classes of shares will continue to trade on Nasdaq as GOOGL and GOOG."