A point brought up in the Traps thread was that you can Resolute against radius effects, which otherwise can't be defended with Spell Parry or Dodge.
Parry vs Resolute:
Parry
30 build prerequisite
Negates damage entirely
Negates carrier attacks
Only effective against physical attacks
Resolute
50 build prerequisite
Doesn't negate all damage (leaves you at 1 body)
Doesn't negate carrier attacks
Effective against weapons, Evocation, trap damage (any damaging attack)
If you're already low on body, Resolute is basically as good as a Parry. With the available rituals changing, Resolute might turn out to be pretty useful, since a fighter can't run around with a pocket full of Spell Shields and Cloak items. However, I'll echo the people saying its utility is highly situational.