[Chathamization]

There seems to be a large number of people who are convinced that the only difference between the present day and a SciFi wonderland is human will. For example, look at the people who think Mars colonization is a good idea, or the popularity of Ray Kurzweil (and to a lesser extent, people who are overly optimistic about self-driving cars).

[nitrogen]

All of the things you listed are significantly more feasible than a laser shaver.