Moore's Law is quickly running out of space for physical reasons: https://interestingengineering.com/innovation/transistors-moores-law

We can't effectively get transistors any smaller. At least with our current understanding and technology.

I've read blurbs about stacked chips, but their biggest opponents are saying we don't have the heat transfer technology to allow that to happen (the insides of the chips will overheat). See here for some potentials solutions to stacking chips

The simple fact is, right now, we don't have the computing power strong enough to replicate the human brain's operating capacity. Which is what we need for general human intelligence.