Last year, when Sony bought the cloud gaming service Gaikai, there was already some speculation about them bringing it to the PS4, which hadn’t been revealed back then. Now, however, Sony has officially stated it will use Gaikai to let people play some of the best games that were released on the PS3 (e.g. Uncharted, Dark Souls etc.), giving the PS4 some sort of backwards compatibility. The feature will launch somewhere in 2014 and at first, only people in the US will get it. After some more testing, the cloud is also going to be available for PS4 owners around the world. At E3, Sony already gave some info about it. You can watch the video here.