There are few things more frustrating when exploring a giant, open world game than watching trees, shrubs, and buildings suddenly appear as if teleported from some invisible realm. But storing the amount of textures and level data necessary to prevent this would require a lot of memory (which next gen consoles will have more of). "I can imagine the next [console] generation will have much more memory, and hopefully [texture] pops will be gone for good," Krzyścin says.
World building techniques such a procedural generation--where game environments are randomly generated on-the-fly by an algorithm (think Diablo II or Terraria)--help prevent the strains of loading a bunch of pre-designed environments into a console's memory. But they don't erase those strains entirely. Krzyścin, however, has a concern beyond that of hardware limitations: "Even if you manage to build huge terrain to walk onto, you have to create interesting content--like quests, communities, stories--so the world would not be boring and empty." Yeah, that's kind of important, too.