Sony’s decision to up the PS4’s internal memory from 4GB to 8GB of DDR5 may seem like a tiny detail, but developers are delighted by the decision.
Specifically, Dishonored's lead level designer Christophe Carrier described his joy at the news to Eurogamer.

"As a level designer we are struggling against memory every day," he enthused.
"We cut things, we remove things, we strip things, we split the levels, we remove NPCs from levels because there's not enough memory.
"So knowing that memory is something that is going to be improved in the next generation of consoles – to us, it's a joy. It's something that we were waiting for.

http://www.develop-online.net/news/4...emory-is-a-joy