Actually, that screenshot is from the World Builder. What this means is that a player can add in trade routes that he/she feels belongs in the scenario. It doesn't mean trade routes will pre-exist in the Epic Game.
I, for one, really don't want to have to move a unit half-way around the world in order to generate a trade route. Instead, I want a system where-if I connect two of my cities together-then trade will automatically occur between them, producing income. I also want a situation where, if I set up a resource trade with another civ, that this will result in the formation of an underlying trade route-that represents the on-going trade in goods and services which is occuring between our two nations-the value of which should be dependant on factors like 'relative wealth', 'relative culture' and 'relative size'. If they have even come close to doing this, then I will be VERY happy!!!
Yours,
Aussie_Lurker.