Making screencasts (also known as "video tutorials") is already easy, and becomes easier with better tools and broadband proliferation. However, no tech is complete without a human who dives in, does experiments, and discerns best practices from the results.
Self-reliance is a vital key to living a healthy, productive life. To be self-reliant one must master a basic set of skills, more or less making them a jack of all trades. Contrary to what you may have learned in school, a jack of all trades is far more equipped to deal with life than a specialized master of only one.