I don't think this will come as a surprise to anyone, but we now have confirmation that the upcoming Marvel series headed for Netflix – led by Daredevil – will indeed be part of the Marvel Cinematic Universe canon.

Marvel's Chief Creative Offier Joe Quesada revealed this to Kevin Smith on his Fatman on Batman podcast (as heard by ComicBook.com):

There will be some interconnectivity, much like the movies. They will exist within the cinematic universe again, so this is all the same world as S.H.I.E.L.D. and the Avengers.

Quesada also confirmed that Daredevil, Jessica Jones, Iron Fist and Luke Cage will all shoot in New York, and I'm going to assume most of this "interconnectivity" will take place amongst the Netflix shows as they all gear up to join forces in the eventual Defenders series. But I'm sure we'll get a Samuel L. Jackson cameo or two as well.