[AlfonsoP]

Think outside the box. Current chips have gates on a dozen metal layers measuring ~1µm, but you could scale to 10,000 layers at ~1mm. Sure there are many unsolved challenge to build 10,000 layers, but there is still PLENTY of space for Moore's law to continue in this 3rd dimension...

[akuma73]

I assume you mean stacking transistors? This has been tried, and there are serious thermal issues. Where does the heat go in the intermediate layers?

[kec]

If you could solve both the heat dissipation and yield problems that 3D chips have you would be a very, very rich man.