Guys, I hate to go against the grain but this express entry speculation makes no sense. It does not entirely rid provincial governments of their ability to sponsor candidates and PNP is not one of their primary targeted economic categories (FSW is).
It will be an eternal pain in the behind to try and merge PNP (us) with another system and I am pretty sure that would be illegal too but I speculate...
Here's some homework folks:
http://www.cic.gc.ca/english/immigrate/express/express-entry.asp
There's a step by step break down of how express entry works (pay close attention to steps 4 and 5):
https://www.canadianimmigration.net/immigrate-to-canada/express-entry.html
That should put the whole express entry thing to bed. Now, since we are all guessing, I will offer my guess: CIC will deal with us appropriately no matter how long and painstaking it will be. And New applicants in 2015 will get a shot at Express entry....step through which they might be 'invited to apply as PNP" haha