Proponents of using avionics and forward-looking sensors to map the world outside of the cockpit all the way to the ground, independent of weather, typically believe that to accomplish the so-called "equivalent visual operations", you need to see the video from the infrared sensor on a head-up display. "Head-up, eyes-out," as they say.
Honeywell doesn't think the conventional thinking is correct. Based on studies that they have completed and are continuing to take part in, they're making a compelling case for "landing credit" using the infrared cleverly merged with head-down synthetic vision on the primary flight display. Click here for a story I wrote in the 4 October Flight International magazine on the topic.
Here's a video on the development. See what you think.