According to Paul Dales, an economist at Capital Economics, "...those who purchase iPhones tend to forgo the purchase of other items — either by postponing spending in advance or by cutting back afterwards. In other words, the release of a new iPhone model appears to have some effect on the timing of consumption, but not on the overall level."
This is surprising to me, because I had not realized that people would cut back on spending, so even though there is a great new product that people are spending a lot of money on, it is hardly effecting the GDP.
Read the article here: http://www.cnbc.com/id/102053376
:)