You can download most of the apps directly from the Google Play Store. So many games are supported with the emulator. This eliminates the need for additional hardware and you also get to use the gyro and other motion controls only available to phones. You can even use your phone as the controller while playing the game on your laptop or desktop.
The Andy Android emulator allows you to use android apps on Windows! Do you ever get frustrated with the small screen on your phone when playing games like Asphalt or Clash of Clans? The Andy Android Emulator fixes that problem for you.