I was at Epcot yesterday, I left before EMH to fly home but I noticed on the time sheet that almost all of the Future World attractions were open until 9:00 since it was an EMH night. They didn't close and reopen.
Edit - I found the time sheet. The following were open until 9:00 yesterday (EMH night): Circle of Life, Honey I Shrunk, Imagination, Living Seas, The Land. Other nights they closed at 7:00. The following were open until 9:00 everynight: MS, Soarin', SE. TT was closed for refurbishment.