So this happened. Apparently, there was a need to increase the display name count for Twitter users. So Twitter has done just that, they have just announced that the character limit for display names is not increasing from 20 to 50.
I am not sure why they deemed this necessary, perhaps they were running out of permutations for display names (although doing the math, this is unlikely). Or perhaps there are a number of celebs they want to join Twitter that has overly long names or parody names they want to use.
Who really knows.