Honestly? I think the framing device would not lend itself as well to a game. Hollywood Visionary tapped into one of those time periods that helped define the American movie industry; the last decade of the Studio System. There is a certain romance associated with that time and the film of that era.
The problem with the one about authors is that it is too personal. Writing is basically a small team job with the writer as the main creative talent. That would work great as a narrative but as a game, there are only so many branches possible. The video games one is the opposite, due to the way games are made it becomes too impersonal, one single person rarely gets that much input on the process when you get to console level decisions.
If you want to do this, my recommendation is to take a step back and go one level above the creative team. For literature it could be set in the aftermath of the Great War as authors who have seen hell in the trenches come home to write their story. This is the time of HP Lovecraft, JRR Tolkien, Ernest Hemingway, Robert E Howard, F. Scott Fitzgerald and so many famous writers. Perhaps the MC has inherited a humble publishing house and new, quirky authors come offering their works. How much or how little the MC meddles with the authors and what sort of genres they pursue might very well determine the fate of the publishing house and shape the course of popular cultures.
For the video games side try a developer/publisher angle. What kind of games you make, what kind of deals you cut, how you interact with the fans and which systems you choose to support could all be interesting decision points.
Alternatively consider being the head of a record label during the golden years of music. Might be Motown, Rock, Disco, etc. How you develop your talent, how you promote your label, what sort of music you produce, what artistes you sign and whether scandalously you are sleeping with one of the talent, all of this lends itself to a blend of game and story.