"We have been working on this for a couple of years. Getting to one bill and getting to account-level pricing is our goal."
I don't see how this takes years of planning to figure out. I think more to the point, he means, "We've ignored the ideas for years to lock as many people into contracts as possible before the pressure from foreign companies made us look bad for not offering it. Now that they are making us look like evil money grubbers, we feel it's time to offer this option as soon as we can figure out how to squeeze you as much as we can on a shared plan."
It's a great idea, and I hope everyone follows suit. My sarcasm aside, why can't I just share my data from my iPhone with my iPad period? Same price, same plan... and ding me if I go over.