I asked before on sleep and I have read Randy Alcorn’s book on heaven and his answer but just now I had this thought regarding sleep and the NJ.
 
Dream time could be time of being in 1 on 1 communication with God a personal time not shared with anyone. Imagine having 6-8 hours a day of personal communication with God no one else present (though I am sure he could arrange for people to be present if desired sort of a mental teleconference). He could create a place in your thoughts just for you and him to be in, to talk in, to have fun in. Perhaps a world in your mind all to yourself having exactly what makes you happy and you would share it will God every day.
 
I think that would make sleeping in the NJ worthwhile. 6-8 hours with God everyday where no one else is around (unless you want someone there [would bring new meaning to sharing your dream]). imagine what amazing fellowshipping you could do.
 
Paul