What do you think about cult creating? Is it different than creating a religion? What are the risks that could make the writer look stupid? I'm eagerly waiting any kind of advice and suggestion.
Have a look at some of the theories around what makes a charismatic leader. Communication is key, and in this tech age, it's not just face to face and on screen, having a clear vision, one that can be communicated, and one that people will follow. Getting people around you who believe in it completely - think of the disciples - is crucial. The leader provides the vision and the energy, the focal point of attention, the followers provide the means to carry out the vision.
Edit for research on leaders
www.businessballs.co.uk are usually pretty easy to follow and will have links.
Consider the followers: what are their aspirations? What is the leader going to deliver that they need.
Some to do research on (because I'm assuming you're after a charismatic leader, rather than one given their position by birthright. If the latter, change your search terms):
Mahatma Gandhi
Hitler
Nelson Mandela
some of the actual cult leaders would be essential reading, I'd have thought.
For some who have shown how to work tech and be a charismatic leader
Steve Jobs (very interesting, as it shows the strength of vision, and, let's be frank, people with bad personal odour, and control freaker-y ways don't fit the idealised model. Plus he's up to date, so there's loads out there on him.)
In terms of theory, it might be worth looking at some of the leadership models and traits. Something like situational leadership (also called the Herschey-Blanchard) shows the skills a leader needs across the range of events. Tannenbaum-Shmidt, shows a continuum which shows how, as an organisation/cult grows, their followers gain more control. This is something a cult leader tries to hold back, as they like to retain control.