As per a recent post on Business Week, Super Bowl fans are now using Twitter along with the Super Bowl running on TV to create a true "two screen" experience. An estimated 144 million Americans own tablet computers or smartphones, said Roger Entner, an analyst at Recon Analytics LLC. Of those, 40 percent use the devices daily while watching television, according to Nielsen. Of that tally, half of the tablet owners and 42 percent of the smartphone users also visit social sites such as those run by Twitter Inc. and Facebook Inc. while watching TV, media- viewership tracker Nielsen Nielsen noted. Commercials now instruct viewers to "Like this on Facebook" or to "Tweet with this hashtag." The iPad allows for a seamless experience without the burden of a keyboard.