For industrial production, the urea would have to be synthetically produced from ammonia, which is produced using the Haber process. Ammonia is such an important mode of fixing nitrogen (splitting the n2 molecule) that the Haber process uses something like 1/20th of the human world's total industrial energy production. I don't know if the process in the cited article would use more or less energy (or be more or less carbon-intensive) than current cement-making processes, but I suspect that things like this would have to wait until we begin fixing nitrogen in some successor process... using bacteria.
Industrial processes in general are going to change from using great heat and pressure to move electrons around in giant reactors to using bacteria, sunlight, and maybe adding electrons directly to the mix when focused sunlight doesn't give the bacteria enough energy density. More power to the folks who do these experiments, but the whole chain of industrial electron twiddling needs to be considered.