Wow, that looks great. Honestly I'd be happy even if that's the end of the graphical evolution of the strategic portion of the game - but happier still if it just gets better 
I actually like the black oultines in almost every case, but I do see a few places where something about them looks off. For example, the outline at the bottom of the big building in the middle makes it look a little strange to me. But all in all I hope you guys stay with the outline. And I agree with other people that making the ground more detailed, so it doesn't look so smooth, would go a long way.
The only thing I really want in terms of city aesthetics that I don't see the makings of in this image is for city graphics to reflect populations. I want a settlement of 100 people to be small, simple, and dominated by a few central structures; and I want a settlement of 20,000 people to look like a thriving, busy populated area with houses tucked tightly together.
I am exciiited!
P.S. does anyone else think the roadside barriers look like wooden power lines? Especially on the far side of the town.