The consistency of being able to use system and field variables keeps getting better and better. A scenario that I came across today is the ability to use a Process Variable in a Field Rule. The reason why is I would only like to show a field when the current user's username is equal to X. The ability to do this would make it so I don't need any extra fields to hold values and compare against. It would also make the variable dynamic.

Being able to compare the value against a team member with a specific role would be very useful as well.