When they shifted their focus toward products that they could develop and sell, computer games first seemed the obvious top choice. Prometheus could rapidly become extremely skilled at designing appealing games, easily handling the coding, graphic design, ray tracing of images, and all other tasks needed to produce a final ready-to-ship product. Moreover, after digesting all the web’s data on people’s preferences, it would know exactly what each category of gamer liked, and could develop a superhuman ability to optimize a game for sales revenue.
I'll bet $20 this is the stage that brings down human civilization. We don't need full AGI to realize a dystopia, we just need something optimized to indefinitely hold our attention.