Moore’s Law is going to slow down because of the capacity of silicon technology; meaning that computer power is not going to be exponentially increased. The two basic problems are heat and leakage. If the chip is too small, it is so intense that can melt the chip. Leakage: if it is too small and so intense, the chip may not handle the electron running inside the chip. Prof. Michio Kaku, physicist, is trying to explain why it would be happened. Intel also admitted by start moving to 3D chip, he noted. He also gives some candidates for post-silicon era. They are molecule computer and quantum computer.
Please watch his talk for detail.