Sure, but those are both engines - not general purpose frameworks and/or libraries. They're specifically designed for games and game-like programs. Granted, I d

Sure, but those are both engines - not general purpose frameworks and/or libraries. They're specifically designed for games and game-like programs. Granted, I didn't really make that distinction, so your point stands. However, even if they do solve the latency issue (usually), game balance for cross-platform use is still very much an open game-specific problem.