Consumer-tracking service NPD says TV sets are now the most popular way to watch streaming video. NPD says 45 percent of consumers report that TV is now their primary Web video screen, up from 33 percent last year. It basically swapped places with the PC, which used to account for 48 percent of viewing but now represents 31 percent. This is a story about devices: NPD figures that 10 percent of homes now have at least one Internet-enabled TV (though I bet that only a minority of them are actually plugged into the Web), and we’re seeing a steady increase in the use of Web-video peripherals, like Blu-ray players, Apple TVs and Microsoft Xbox 360s.