I've seen every version of the CoP since it was moved to
Disneyland from the 1964 NY World's Fair, then moved to MK when WDW opened, then "restored" (to its currently-running version, decades ago.)
The version playing at MK now is very close to the original version personally supervised by Walt, himself.
Yes, the last scene is now long-dated, but so are all of the scenes preceding it.
I see no reason to "update" it, any more than one needs to "update" a classic film.
It exists, frozen in time, for those who want to see it in a "classic" form.
It was fun, back when CoP was first constructed, to exit out the "front" of the theater
(where the stage is in the last "stop" on the circuit) whereupon guests could view another free-standing "scene"
of a working model of Walt's "City of Tomorrow" narrated by the unseen voices of the "father and mother" of the show.
That city model (some would call it an early version of Walt's original idea of the "real" EPCOT) can now
be viewed along the route when guests ride the TTA PeopleMover.
.