A USB hub is definitely not the same thing as a docking station.
I've actually never used one of the USB docking stations, I've used business class laptops that have dedicated docking ports built-in. The advantage to the dedicated docking port is that you make only a single connection to the laptop and everything, power, video, audio, etc... is connected. With a USB dock, you need to connect at least the power adapter cord to the laptop in addition to the USB connection to the dock. With a USB Hub, you'd need to connect power, video and the USB connection to the switch. In addition, all peripherals used (keyboard, mouse, audio, etc...) need to be USB, not so with a docking station.