Drag a window to the right edge of the MacBook screen and it shows up on the Tesla display – with some lag, which he cheerfully acknowledges. You can drag windows over to the Tesla screen like you would with any external monitor. Lee added that he’d been running it daily on his own Model X. The 17-inch rotating screen in the Model X, with its 2,200 × 1,300 pixel resolution, lends itself especially well to this type of setup. Whether that justifies calling your Model X a “mobile office” is between you and your accountant.