Psychopav
Help us, Joebi-Wan Brynobi, you're our only ho
They should use it to reboot Starwars (or explain the sequel trilogy anyway).Well she can alter reality so I'd expect it to be something like what she's done a few times in the comics with reshaping the universe.
. A young person like Wanda wouldn't be really overly familiar with 50s and 60s family sitcoms, so it would be weird for her to conjure that place. Vision on the other hand is really just a walking AI Internet, and he would have access to everything that he would assume is the idyllic family situation. The lady at the end (Kathryn Hahn I think) telling him that he is dead could also be a clue that he is the one who has conjured this "dimension" or world. So if it is Vision, perhaps it is more akin to the dream analogy you referenced.