Yes, I understand dockstation is connected via proprietary PCIe port with electronics to handle connectors, so mini Display and USB3 ports remain available on Surface.
Like the SP2 docking station, it has USB 3.0 ports and a mini display port. Unlike the SP2 dock, it also allows you to hook up extra peripherals to the ports on the SP3 directly. If you had to hook your monitor up to the SP3 directly every time then the docking station wouldn't really be a docking station.