Ok, so I just turned
OFF the 'Optimize for Video' setting and now I'm not getting any more problems with pixelation or blurring on webpages.
Ironically turning ON optimize for video was another suggestion on a forum to improve the mouse lag problem I was having!
So, I take it all back DisplayLink, your product is actually pretty damn good ;-)
All it took was updating the USB3 drivers. I hope there is a similar option out there for Windows 8 users soon!