Most longtime JW's I knew didn't really talk about the New System with any kind of detail. Most just used it as a nice picture to hold in thier heads to get them through this life and blot out the thought of dying like everyone else who has ever lived.
I did hear some on occasion who thought we'd go back to the horse and buggy, living off the land days. Others thought with perfect minds, we'd come up with things that we haven't even thought of yet and possibly populate other planets ( Well what else could Jehovah have made them for???)
Most who talked a lot about the details with any intensity were gone in a short time, they were mostly talking outloud to reaffirm their own doubts . Long time JW's have stopped talking about it as they've heard it all before and it's too late to really matter to them now. Knowing how close it is, is the major thing rather than what it will be like.
Now that I think about it, the Watchtower literature never really spoke in much detail about the New System but they did talk a lot about destruction, the end of this system and the tribulation then they let the paradise pictures in the publicatons do all the talking and by comparrison, living in one of those photos was a lot more attractive than having God kill you.