Can Microsoft's Xbox 720 Withstand an Early Assault from Sony's PlayStation 4?

NASDAQ Both PlayStation 2 and PSone shipped one year before their competitors -- GameCube (shipped in 2001; sold 21 million units), the original Xbox (shipped in 2001; sold 24 million units) and Nintendo 64 (shipped in 1996; sold nearly 33 million units). http://www.nasdaq.com/article/can-microsofts-xbox-720-withstand-an-early-assault-from-sonys-playstation-4-cm213402