The bill of parts is probably 10-20% less than the previous slim model. They also probably require less packaging material and weigh less meaning freight from Asia or other manufacturing hubs to distribution points will be cheaper. That can translate into an additional $10-$20 net profit on each unit sold rather than the relatively slight margin Sony currently makes on the previous PS3 slim. You sell a million of these this Christmas in bundles in each of the three major regional markets and that can really add up quickly.