When will hardware hit the wall

Hardware is becoming more and more amazing, but it is getting to that limit of, what can you do next. Most every update in hardware these days is new CPU, better RAM and better graphics. Only problem is CPU is so fast no one really notices or cares about faster. RAM is up to like 16GB to 32GB commercially, which for the generally user is more than perfect. Graphics are normally 1080p, but can go to 4K which is as good as the human eye can see. 

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