Yes, which are almost as useless as the "sold x million first weekend" metrics that get parrotted by media.
If the user base increased by 50% between the two releases, they can convince 50% less people to upgrade the first weekend, and still sell more the first weekend than they did last time.
The sold x million certainly tells you some hard dollar number that is uninteresting, but it gives you no idea how popular the device will actually be, even though it sounds like it should.
If the user base increased by 50% between the two releases, they can convince 50% less people to upgrade the first weekend, and still sell more the first weekend than they did last time. The sold x million certainly tells you some hard dollar number that is uninteresting, but it gives you no idea how popular the device will actually be, even though it sounds like it should.