There is a possibility that Dell could be considering incorporating a 120 Hz or 144 Hz panel with the Alienware m17 laptop at some point in the future, although nothing concrete has been confirmed (or denied). The topic was raised when Dell's Frank Azor asked a concerned gamer on Twitter what they would miss about the Alienware R4 series.
https://www.notebookcheck.net/Dell-could-be-planning-120-Hz-or-144-Hz-panel-options-for-the-Alienware-m17-gaming-laptop.397176.0.html