Pre-launch metrics are still fairly valid, the price and features haven't changed and there's still no army of casuals stampeding out to buy a $500 box for kinect 2.0.
http://www.nowgamer.com/features/2186957/supply_demand_ps4_is_worth_more_than_xbox_one.html
http://bluepromocode.com/blog/trend-report-playstation-owners-more-loyal-than-xbox-owners-1
http://www.gamespot.com/articles/xb...ter-right-now-but-you-don-t-care/1100-6416542
http://www.mcvuk.com/news/read/ps4-...-buzz-than-xbox-one-in-first-72-hours/0125267
http://www.gamespot.com/articles/ps...pective-launch-weeks-data-shows/1100-6416589/
https://www.google.ca/search?q=ps4+survey
https://www.google.ca/search?q=ps4+sales
http://www.nowgamer.com/features/2186957/supply_demand_ps4_is_worth_more_than_xbox_one.html
http://bluepromocode.com/blog/trend-report-playstation-owners-more-loyal-than-xbox-owners-1
http://www.gamespot.com/articles/xb...ter-right-now-but-you-don-t-care/1100-6416542
http://www.mcvuk.com/news/read/ps4-...-buzz-than-xbox-one-in-first-72-hours/0125267
http://www.gamespot.com/articles/ps...pective-launch-weeks-data-shows/1100-6416589/
https://www.google.ca/search?q=ps4+survey
https://www.google.ca/search?q=ps4+sales