Just waiting for all the "hardcoe" fans to come in and say:
"This feature svcks coz it isn't realistic and takes away from teh immershun!"
The feature is a logical consequence of an interactive map. Wasn't it already in Daggerfall?
Without a map that shows quest locations, and without a journal that documents your quests, you use pen & paper. Heck, for http://www.mobygames.com/game/c64/starflight I put the starmap in a transparent plastic bag and crossed out every star system I've visited, drew in fast-travel routes etc. I'm fine if the computer does that work for me, as long as the map (or compass) doesn't show more than my character can possibly know. There is a difference between "there's that dungeon I have cleared a few days ago" and "over that hill and past that thicket is an ancient ruin."
As for "immershun" that's usually not the argument of the "hardcoe" RPG fans. Immersion is contra-productive to role playing. That starts with you being blinded if your character stares into bright light as if both of you had cameras for eyes, and leads to situations where your talent at playing http://en.wikipedia.org/wiki/Simon_%28game%29, completely overrides your character's conversation skills.