Most people buying the iPad 3G have no intention of replacing a Mac or Windows computer with it, claims UBS analyst Maynard Um. The firm surveyed approximately 75 people lined up outside of New York Apple Stores on Friday, and found that 94 percent intended the device to be complementary. Most pointed to web browsing, video and other forms of entertainment as the device's main uses, with "only a handful" expecting to do e-book reading.