Here's a longer write up on the hardware involved and thinking behind it. It's linked from the article but I thought this explained it better. http://blog.nytl

Here's a longer write up on the hardware involved and thinking behind it. It's linked from the article but I thought this explained it better. http://blog.nytlabs.com/2013/11/05/diff-a-live-comparator-for-the-web/ http://blog.nytlabs.com/2013/11/05/diff-a-live-comparator-fo...