Sony unveils PlayStation 4 Pro

http://money.cnn.com/2016/09/07/technology/playstation-4-pro/index.html?iid=ob_homepage_tech_pool

Didn't pre-order Xbox One or PS4? Duke it out on launch day — or wait 'til 2014

http://www.nbcnews.com/technology/didnt-pre-order-xbox-one-or-ps4-duke-it-out-8C11523817

Sony and Microsoft unveil the PS4 and Xbox One's starting lineup of entertainment apps

http://www.nbcnews.com/technology/sony-microsoft-unveil-ps4-xbox-ones-starting-lineup-entertainment-apps-8C11566215

Microsoft changes Xbox One policies after outcry

http://finance.yahoo.com/news/microsoft-changes-xbox-one-policies-214449370.html

PlayStation 4: More than just a pixel powerhouse

http://money.cnn.com/2013/02/20/technology/sony-playstation-4/