The cost you are talking about is only for physics and logic in multiplayer games, it doesn't apply to single player games. And even then it is negligible compa

The cost you are talking about is only for physics and logic in multiplayer games, it doesn't apply to single player games. And even then it is negligible compared to the biggest cost in gaming: rendering. Prediction requires rendering being done on the client, which requires a hefty video card and defeating the purpose of streaming.