I always wondered whether they use something like this for BBC Radio 4’s “Just a minute”.
For those not familiar, it’s a radio panel game where the panelists must speak on a subject for up to a minute without hesitation, deviation or repetition.
I imagine they would need a screen like this to highlight repeated words for the host (perhaps in combination with some speech recognition, or stenography).
Also they do make heavy use of managed pointers in the codebase.