Comparison for last launch: Sony was estimated to ship 2 million consoles, but only ended up shipping 500k.
Microsoft estimated 10 million 360s for their first fiscal year, but later lowered their forecast to 5.5 million.
http://www.benzinga.com/news/13/08/3838885/sony-rumored-to-ship-10-million-playstation-4-units-topping-xbox-one
http://www.neoseeker.com/news/5115-microsoft-revises-xbox-360-shipment-forecast/







