BlueStacks would be the most widely known emulator for running Android on Windows PC, and now there is a new entry to this niche named SocketQ's WindowsAndroid. However, there is a HUGE difference between the two - unlike BlueStacks which uses a virtual environment to host Android in Windows environment, SocketQ's WindowsAndroid is a full native port of Android to MS Windows architecture.
Running Android as an native Windows application allow Android to make use of full hardware and
graphics acceleration with high performance media codecs available to Windows PC. This not only offers higher performance but also integration with Windows’ applications like Flash, Windows Media Player, etc. Do checkout the demonstration video below.