With this merger, AT&T is going to be the biggest phone company and the biggest wireless company. That means they're also going to be the biggest competitor to the cable companies.
The wireless phones will be used to manage more and more of our lives. If we are going to use these phones for all they can offer, we have to be smart about it. Either that or there will have to be new laws passed making it illegal to drive and talk at the same time.
AT&T actually exited the cell phone business in its early days and had to buy its way back into wireless later. If it hadn't been broken apart, you'd never have gotten the creative juices of competition that pushed all this new technology we have today.