Here's a breakdown of what Dreams is for those still wondering:
1. Game Engine like Unreal Engine but easier to use
2. Music Making app like Garageband
3. Movie Making app like iMovie
4. 3D Modeling App like Maya but much easier
5. Animation Studio
All combined in a YouTube-like environment where you can use the tools to make stuff like games, music, art, movie, but you can also experience what other people make.
The PS5 Exists.