I'm not to technical on this sort of stuff but...
I'll give it a try
I personally reckon the ps4 will be made from standard pc components to lower costs (no cell or anything like that)
Cpu- AMD FX 4100 (currently £90)
Ram- 4gb (currently £15)
GPU- AMD radeon 7770 1GB (around £90)
Blu- Ray (around £20)
Hard drive- at least 500gb (around £40)
Anything Else (around £65) for stuff like the case, motherboard, PSU and Fans
TOTAL MANUFACTURING COST -£320
If the PS4 launched today it would cost £350/ $450/ 425 euros/ 45000 yen
possibly making a tiny loss due to marketing
although these parts will be noticeably cheaper in late 2013/ early 2014
Xbox One, PS4 and Switch (+ Many Retro Consoles)
'When the people are being beaten with a stick, they are not much happier if it is called the people's stick'- Mikhail Bakunin
Prediction: Switch will sell better than Wii U Lifetime Sales by Jan 1st 2018