by the end of 2010, the rhythm market, initially propped by game bundles with instrument controllers, was considered "well past its prime" and has shifted towards downloadable content and potential integration with motion control systems. citing the downturn in rhythm games, activision shuttered their "guitar hero" division in february 2011. viacom completed its sale of harmonix in late 2010 to an investment-backed group to allow it to continue developing "rock band" and "dance central" on its own. analysts suggest that the market for these types of peripheral rhythm games may be stagnant for three to five years after which they may resurge on new consoles or based on different distribution models such as a stronger focus on downloadable content.