While reading I thought you were going to suggest unified memory between RAM and VRAM, since that’s somewhat analogous, though that does exist with various caveats depending on how it’s setup & used.

SIMD/SIMT probably isn’t ever going away, and vector computers have been around since before segmented memory; the 32 threads in a CUDA warp is the source of its performance superpower, and the reason we can even fit all the transistors for 20k simultaneous adds & multiplies, among other things, on the die. This is conceptually different from your analogy too, the segmented memory was a constraint designed to get around pointer size limits, but 32 threads/warp isn’t getting us around any limits, it’s just a design that provides high performance if you can organize your threads to all do the same thing at the same time.