I think it's something that could happen right now. Here is a video of a guy turning his memory of a lemon into a generative text output using GPT: https://youtu.be/-HYbFm67Gs8

If he had just trained it to recognize his thoughts of a lemon for thoughts of a lemon, then the text output would have been: "Lemon"

There are already models that convert text to video, so it would just have to hand off to a video generative model to produce a video of a lemon instead.