Make no mistake, Miracast is not confirmed for the X1 but DLNA, they keep swaying around it for some reason. They hinted it on a presentation, where they showed playing a movie to the X1 (PlayTo via DLNA) and in the next presentation after they showed off Windows 8.1 Miracast, the TV seemingly did not switch input and was still connected to the X1 (switched from the paused Movie directly to the miracasted Windows 8.1 startscreen). At the end of it he said "in this case a TV with a miracast receiver connected" so this kinda made the impression that the X1 IS the receiver, but they did not show that it actually is or supposed to. Still i hope the X1 actually has Miracast, there is literally no reason it not having it because like you said it has WiFi Direct support, Miracast is using WiFi Direct.