AI already exists, we have computers that can detect objects from images, drive cars, detect diseases from MRIs, defeat the best human chess players, and win at Jeopardy. Computers can now do many creative and intellectual tasks better then humans can.
These things are pretty impressive mental tasks that certainly involved "intelligence" and that used to be done solely by humans.
Beyond that, you will have to define what "real AI" is. One measure of what AI is the Turing Test, where a computer would have to respond in a way that is indistinguishable from a human (ironically this would mean being stupider at things like retrieving knowledge and making quite calculations).
I think that the Turing Test will eventually be passed by a computer. I also think that this is further off then many people are predicting.