This certainly is a dilemma. As some of you have seen before, Quantum Computing is the way of the future. There are a lot of complications with Quantum Computing, as Dr. Kaku explained. However, it is not to say that we will forever be unable to manipulate them in the manner we need to make it a reality.
One thing to take from this however is that electronics on this trend will still continue to become more and more powerful. We will have smaller, more precise computers. But we will also see a road block when we come to the point that 2D circuitry reaches it's limits.
The road block comes with a lot of implications, most of them financial. Companies like Intel will need to keep up with Moore's Law otherwise the prices of their products will fall, just like their old products do now. Without a current product to sell, their company will be at risk of going bankrupt. Consumers may end up having to pay more for electronics to keep this research going onto breaking free from that road block.
I, however, am not particularly worried. Financial incentive is just as great a motivator as a scientific incentive, and with the combination of the two they will find a way to make things happen! Still, it's interesting to think.
Could we see the end of Silicon computing in our lifetime?