apparently not all #usb 2/3 to #vga/#dvi/#hdma adapters are the same

apparently not all #usb ⅔ to #vga/#dvi/#hdma adapters are the same

DisplayLink (for example)

http://www.displaylink.com/technology/technology_overview.php

DisplayLink USB graphics technology is a unique approach to USB graphics, allowing smooth video playback and providing a low latency connection that feels very much like a traditional monitor while providing the "plug and display" simplicity of USB. DisplayLink USB graphics technology allows for high resolution, full 32-bit color graphics, at resolutions up to 2560x1600 (depending on chip used).

http://www.displaylink.com/

http://www.displaylink.com/shop/docks

not to be confused with

http://www.thedisplaylink.co.uk/

DisplayLink even do a USB 3 to HDMI 4K adapters

http://www.displaylink.com/shop/hot_products.php#dell-d3100