As of the popularity of SP3, no one has a clue. Some journalists claim they know, but they don't. I would like to share a couple things I found. Hope others cans share more. First thing I notice is right in this forums, within 1.5 months of availability (US, Canada), number of threads and discussions is exceeding most of previous versions, at this rate, it can over take every other threads soon. Second, I go to bestbuy.com checked reviews, the number grows much faster than all previous versions in similar time frame. Also it grows steadily after initial surge. This is not scientific, but those things usually reflect interests and sales reliably. What you think?