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If you have a HDMI port already you could use that,its just one cable. The hub could be handy if you have a full desktop setup (2 screens / keyboard / mouse) which you want to leave in place if you regularly unplug the laptop and take it away - you could just leave the hub and unplug a single cable.
the right hand port looks to be USB 2.0 type B - right hand in this image
Would imply to me that the screen has a built in USB hub.
Cheers. That's what I thought.
Just wasn't sure if there would be some benefit to using some sort of thunderbolt hub thingy. Or if that little square female socket next to the vga was something.
I guess a hub allows for a 2nd screen. But this screen is already a bit of a beast on a small desk.