WWE announced last night at the Smackdown tapings that the WWE Hall of Fame will indeed air live on the WWE Network. WWE had to clear it with USA Network. If USA opted to show the one hour broadcast this year then WWE would not have been able to air it on the WWE Network at least until after it aired on USA.
No need to worry about that though and I think it's a great move to get the live broadcast on WWE Network. That should help get some extra buys. There will be an announcement on tonight's WWE Main Event.