Re: Been hearing this...
There are such things as atoms you know - making a Silicon transistor smaller than an atom is tricky.
There are also a few other limits, like the speed of light, the uncertainty principle and the 2nd law of thermo-dynamics. It might be very cool and thinking outside the box to ignore them - but the universe isn't that easily fooled.
Arguably Moore's law has already ended. The original phrasing was that the most economic number of gates to put on a single chip increases exponentially. That is no longer true, the fab needed to make 14nm parts is so mind bogglingly expensive it is cheaper to make 22nm wafers with fewer gates.