usb 3 video monitor hookup

[sdowney717]

for example like here
http://www.youtube.com/watch?v=iDhFyOwaN3Y

http://www.metacafe.com/watch/5770935/worlds_first_power_your_monitor_with_usb_displayli nk_usb_3_0_bus_powered_display_ces_2011_tekzilla_d aily_tip/

so does this use a video chip, video card?
how about real performance as in games

I also read we will see usb 4 even much faster then usb 3