Netflix may have been built on red envelopes, but 2010 showed just how prescient the company's name really is. The DVD-by-mail service has transformed into an Internet video empire with 20,000 movies and TV shows available on demand through more than 100 devices. Start a movie on your PC, finish watching with the Netflix app on your smart phone, iPad, Nintendo Wii, TiVo, Blu-ray player, or Internet-connected TV. The service carries easily from one device to another and picks up exactly where you left off. Gift subscriptions at Netflix.com.