He is talking about a minimap, something that would help not opening the world map each time you want to know if you're going the right direction.
Original Sin did it and I have to admit it's pretty useful. It's become a very mainstream UI element and I have to admit I miss it myself whenever I play BG2 etc.
Reference, top right: http://www.thegamersocial.com/wp-content/uploads/2014/02/Divinity-Original-Sin-Combat.png