While I'm sure today some tech guys could write an algorithm to enhance a "pitch", the Entertainment Industry relied pretty much on a pitch as an art form - just the right mix of excitement and temptation, an encapsulated plot, dropping a name or two of who might star in the vehicle (or at least a star "type" - "imagine, if you will, Meryl Streep in the part……."), all designed to appeal to the universal desire for box office success. (The music industry version was a pitch accompanied by a "demo" tape - and so, while still selling a dream, had attached to it an actual example of the potential - both a plus and a huge minus in that it's sometimes easier to sell a dream if the particulars are left to the imagination).
And pitches are hardly limited to ideas or projects. We all pitch things both personal and professional all the time. We're pitching when we apply for a job and when we try to recruit talent. We're pitching when we invite people into our circles, and when we seek to be included in other's spheres. We're pitching when we seek a raise or try to raise money - whatever the purpose. In fact, while we don't necessarily think of it as "pitching", we are probably pitching things on a daily basis. Recruiting a new board member is a pitch, courting donors is a pitch, negotiating an agreement on something is a pitch, selling audiences is a pitch, arguing for a marketing approach is a pitch.. Even your suggestion to your spouse of where to go to dinner, or what movie to see, is a pitch.