Over time, the resolution should get finer.  With the thickness being demoed coming out of the nozzle, we are at the bitmap phase, rather than hi-res.  At the scale of a large building it may be fine, but up close it looks like piping from decorating a cake.  I guess this will be good for real-life Mindcraft.
http://www.architectmagazine.com/technology/skanska-aims-to-commercialize-3d-printing-with-concrete_o.aspx?utm_source=newsletter&utm_content=jump&utm_medium=email&utm_campaign=ANW_112614&day=2014-11-26&he=e749b8e8e3208b01643d06708f7ee5e09514ec3e