The D6000 looks firmly towards the future for display options by ditching the VGA port and instead focusing on support for up to three HD/4K monitors, or one 5K monitor - all running at a smooth 60fps. It can be used on old and new laptops thanks to an adapter on the connection cable allowing it to connect via the newer USB-C port, or a legacy USB-A slot.
The Dell D6000 dock is one of the best USB-C hubs around for the modern professional Dell user.
No VGA support (not a problem for modern displays really)