The Dream Sequence, was this done again as Brainstorm?
Although I'm not a fan of the dream in Futureworld which takes away a lot of the magic of Yul Brynner's Gunslinger, it got me thinking an entire movie was made with the window into your dreams plot. Brainstorm with Natalie Wood. I've got to rewatch that to see how similar the idea is. One similarity is these were the last appearances for the two actors.