Not surprising news, DICE and Microsoft promised the players to test their Xbox One games on actual Xbox One platform at PAX Prime but again after E3′ s disappointment the players surprised at PAX that they are playing battlefield 4 on PC with the E3 build of the game.
BlindSpider11 has wrote his “review” at Reddit:
-Running on PC’s with Xbox One controllers.
-Seems to be the E3 build. Battlefield 3 style death animation, “Battlefield 4 at E3” banner upon death, etc.
-Resolution was set to 1920X1080
And the funny thing, The game was crashed during playing and exit to a windows 8 desktop, And when you died it showed the BF4 @ E3 ad. So it’s the E3 PC demo with an Xbone controller hooked up.
This screens explain some points by “NeoGaf“:
Source: Reddit | NeoGaf