That's what this RBC/ChangeWave's surveys says. Back in April 2007, fewer people were interested in buying the original iPhone compared to those wanting to buy the iPad on February 2010. Does this mean the iPad would be a bigger success?
Not necessarily. It may mean that, but we don't really know for sure. First, back then the iPhone was completely unknown. A new, unproven product, with no user base whatsoever. Today, the iPhone and iPod are well known, so one could even argue that—given their massive popularity—a higher percentage of people would be interested in buying the iPad. In other words, who knows. Let's wait until Apple actually makes the iPad available on their site.
There are other interesting data points. One is the version people are most interested in: The lowest end and the highest end win, with 19% each. With the 64GB Wi-Fi getting only 8% and the 16GB Wi-Fi and 3G version getting 9% of the interest.
Another interesting one: 68% of the people interested in it want to surf the internet, 44% for email, 37% for eBooks, 28% for the reading magazines and other periodicals, and only 24% for watching video. [Digital Daily]