We see an entire planet which has many limitations.

We are looking at a future where to a first approximation everyone is wealthy.

Disease and ill health are caused largely by damage at the molecular and cellular level, yet todays surgical tools are too large to deal with that kind of problem.

One of the things that we can say with confidence is that we will have much lighter, much stronger materials, and this will reduce the cost of air flight, and it will reduce the cost of rockets.

We see an entire planet which has many limitations.

The new technologies that we see coming will have major benefits that will greatly alleviate human suffering.

If you think the technology is infeasible, you don't worry about what it might do and what its potential is.