Absolutely. First and foremost, they're used to protect our products against piracy, which is of course why they were initially designed. In fact because we've always been a digital industry, we've always dealt with the issue of piracy. It's just that the introduction of the Internet and the online marketplace have just exploded that to an exponential degree.
However, because we have longstanding experience with these measures, we actually have used them to implement all sorts of different models. Not only do they protect against piracy, they are actually used to differentiate our products. So for example it's TPMs that make a trial version of the software available to you. You can test it out and decide whether you actually like it, and then decide to purchase it later on.
TPMs are also used to implement parental controls. This goes to Ms. Dhalla's point with respect to making sure that children aren't getting access to inappropriate content. While all the consoles have parental controls built in, which permit parents to actually prevent their kids from accessing inappropriate content, it's the TPMs that actually permit this to happen.