I remember from FX that you could undock the flightdeck, for example, all you see is the clouds, then have the option to move the main instruments and other parts of the flightdeck onto other screens. Yes, I know you can display the PDF, ND, and other displays and drag them onto another screen, but for cockpit builders, we need much more.
This would be part of the multi-monitor support that we are waiting for.
I hope that this aspect of it is indeed part of their roadmap.