The items in the UI are (by row): mudbrick, wheat, pigs, lumber, copper, limestone.
I added roads a few hours after I posted this, actually, and they each fill a hex. That's a necessity so that units can use them to move around. However, I would like to add some "life" back to settlements by having the inhabitants wander around. Those citizens would walk along smaller paths on the borders of hexes. Walls will probably fill hexes entirely, like roads.
Even with infinite resources there will still be a need for expansion. The economy has changed a bit to put more emphasis on the rate of resource production, rather than the raw amount. Bakeries for example, consume 1 wheat every 100 seconds, the stockpile of wheat isn't as important as the ability to produce it at that rate. Warbands will follow a similar model.
I'm planning on making them the focus of the next devlog, but in essence each warband will be a constant drain on resources. A single copper patch will only support a limited number of warbands (probably only 1).