Apparently one of the developers spoke on NeoGaf Forums and said that the trailer was a pre-pre-Alpha, and that there will be alot more improvements on the way graphically.

But I am reluctant to put total stock in the statement since I haven't been to NeoGaf for any length of time and don't truly know the situation there, but it would be cool to see just how those graphics could be improved.

Textures would be a good start, some don't look very detailed to be honest, but other than that the trailer was ****ing amazing.