I would not say never, but the other pieces of the ABB puzzle are getting done first. Johnstown still serves as administrative hub of the entire system. They still have to upgrade the physical plant in order to be able to insert local commercials and local inserts (ie Local on the 8s) into the various HD streams. When you start seeing local commercials on existing HD channels, I think the expansion of HD service will quickly follow.
They have made some initial steps by clearing bandwidth in shutting off some unused analog channels. The WQED and WPSU QAM HD feeds are now living in the space where the old channel 20 used to live.
It's never fast enough and I too am frustrated at how many channels remain unavailable or limited to analog SD.
"One of the few good things about modern times: If you die horribly on television, you will not have died in vain. You will have entertained us."
- Kurt Vonnegut