This may be related to the new power supply that Taiwanese electronics company was getting order from "Japanese game console vendor" (sorry I forgot the link).
Less power consumption may be due to new GDDR5 chip and weight reduction should come from new power supply.
Edit: Found the link (you must be the member to see it). Shipment already started at May and 1M units/month.
http://news.nna.jp/free/news/20150508twd003A_lead.html
Less power consumption may be due to new GDDR5 chip and weight reduction should come from new power supply.
Edit: Found the link (you must be the member to see it). Shipment already started at May and 1M units/month.
http://news.nna.jp/free/news/20150508twd003A_lead.html