The NPD Group reported in its “Connected Home” study that compared to the 315 million residents in the U.S., there are 425 million gadgets to get online. The most connected devices were desktops/laptops at 183.8 million, followed by smartphones at 133 million.

Also on the list are 39 million console systems, 31.8 million tablets, 16 million HDTVs online, 12.9 million Blu-ray players, and 8.5 million streaming media boxes. In the future, NPD Group expects the second-screen experience and integration between TVs and mobile phones to push the market.

“Through 2013, multi-screen and multi-device synergy will lead the growth in the broader connected device market, but only if services consumers desire are delivered in a simplistic manner,” said John Buffone, director of the NPD’s Connected Intelligence team. “In this connected world, content providers and consumer technology OEMs need to determine the optimal mix of services and have them on the right devices.”