Hot and Hi - that is exactly the reality tablet that some of those who are convinced it is all about a 'fighter-pilot' level of lookout need to take.
Small, slow moving aircraft are just very difficult to see - big stuff or fast pointy stuff is much easier to notice.
ANYTHING that helps you detect a conflicting or potentially conflicting aircraft is a good thing - even with the false alarms such systems can give.
Those that think the Mk1 eyeball is enough have probably missed hundreds of potential conflicts in the past but just don't know it.
A colleague was saved by TAS just last week when a light FW nearly went straight through their 2-ship RW formation - it came from behind so the best lookout in the world wouldn't have saved them. TAS allowed them to detect and avoid.