Good News and Bad News: Confirmed, "Xbox One" does not have to be always on . But, Xbox One is Not Backward Compatible

[Nsanity]

Q: Will Xbox One allow players to trade in, purchase and play pre-owned games?

A: We are designing Xbox One to enable customers to trade in and resell games. We’ll have more details to share later.

http://news.xbox.com/2013/05/qa