Hello Im Aaron, I'm the Community Manager for moddb, indiedb & slidedb. I love getting your hard work the attention it deserves, I also dabble in 3D art. If i'm not out getting the kids off my lawn, I'm usually modeling or managing site content. Your welcome to message me about any issues or just drop in for a beer.
Never touched displacement modifier, however misclicked on my last model and used it for the roof, that got me thinking for sci-fi walls and panels, the system works fantastic for making a high poly detailed wall, and swapping down the amount of poly on the base plane mesh for your low detail game model.
I'm sure people do this all the time, but as i've never used it, keen to show some basic results.