Some people buy a Motorola Xoom and think about using it as an actual phone. If the Xoom has the option, they would love it to simply replace the phone. But can the Xoom tablet make a Phone call?
You can use Skype, Google talk app to place Voice calls via the Internet, but the Xoom isn't designed to be an actual phone yet. In fact, in Europe the Galaxy Tab had the ability to make calls on Xoom, but the US Carrier restrictions prevent it here.