I think that it would be very useful to many games if there would be the option for the Turn Tracker automatically displaying the name of the character or token that is going to act next --obviously not for hidden tokens or those in the GM's Layer.
This would make online GMing easier (*) by being able to optionally remove the effort of specifically stating again and again (by speaking it or by typing it) who is acting at the beginning of each turn.
(*) Especially for text chat based Roll20 games.