TITLE: Where stands functoriality in 2009?
QUESTION [27 upvotes]: Robert Langlands is famous in number theory for making famous and deep conjectures about very abstract things called automorphic forms, somewhere in the 60s.
There's a very interesting article by Langlands called Where stands functoriality today which describes the development of the subject from Langlands' point of view as of 1990s.
But if somebody was to write an overview of the current state of Langlands functoriality, what would it say?

REPLY [9 votes]: Perhaps the best answer to the question "Where stands functoriality today?" is given by Langlands himself in his informal write-up of two recent lectures (March 2011) given at the IAS, available here: 
http://publications.ias.edu/sites/default/files/functoriality.pdf