In reality, what the introduction of agency pricing and the continuation of geographic restrictions will do is encourage more ereaders to turn to "alternative" sources to acquire ebooks.
Publishers are their own worst enemy when it comes to their outdated business models. Having failed to learn anything from the flailings of the entertainment industry, they have missed a fantastic chance to lead the way. They get no sympathy or credence when bleating about supposed lost sales when these practices continue.
As my youngest son is fond of saying...."Epic fail"
ereaders will still sell, fall in price and continue to increase in popularity, just as MP3 players did 5-10 years ago.