Oh, for those of you who have no familiarity with Starcraft II, you can check out the nifty trailer.
Chief among things to mention is industry and production. Both on the large scale and the small scale.
We already briefly talked about this in an earlier thread, where Korhal was mentioned, it being converted into a nearly planet-wide city in the span of four years, where previously it had been nothing but a radioactive wasteland. Starcraft II gives us a lot more detail. It shows us a spinning image of the planet, and it is indeed nearly fully covered in bright lights and super-cities. The planet's population is, however, merely a few billion (which is, believe it or not, too much considering previous population statements), requiring that most of the infrastructure seen is heavily automated.
But it doesn't end there. An even more impressive showing comes in the form of New Folsom:

The heavy infrastructure is there because of the shifting mantle of the planet. It was put there because New Folsom originally held extremely valuable resources. It later failed as a good resource outpost however, given that the same resources were found on planets that were easier to mine. So it was converted into a prison planet that still functioned as a resource point. Of course, why this is interesting should be obvious. The sheer scale of the infrastructure on the ground is quite literally insane, not to even mention those blobs floating around in space.
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