SM at WDW will be undergoing a refurb to get the Disneyland treatment. Timeline is not available, but if you know what that means...it's awesome news!
My eldest DD LOVED the Disneyland version -- rocking music, completely in the dark, SMOOTH. I hope when WDW refurbs, they put the darkness back in, and add the 2-seater "cars."
Not a big Space Mountian fan here. Now if your talking about the Rock'n'Roller Coaster thats something else.
I used to really like space mountain. It's just too rough lately very jarring. A referb would be welcomed.