In the future, there will be sommeliers for everything from toothpaste to flip-flops. Today's example: water.
Take Mahalo Deep Sea Water, at £20 for 71cl, which comes from "a freshwater iceberg that melted thousands of years ago and, being of different temperature and salinity to the sea water around it, sank to become a lake at the bottom of the ocean floor. The water has been collected through a 3000ft pipeline off the shores of Hawaii." According to the Daily Mail, Mahalo has a "very rounded quality on the palate" and it "would be good with shellfish."
There's even a book on this "up-and-coming trend": Fine Waters: A Connoisseur's Guide to the World's Most Distinctive Bottled Waters.
Update: The Grand Hyatt Sao Paulo has a cheese sommelier, a specially water menu, and "an extensive soap menu".