Where are the sources that Sony making tons of monies on PS4?

[Alby_da_Wolf]

Probably, despite lower sales, an important part of higher profits came from PS3 profit margin growth. A small additional contribution is probably coming from PSV margin too, now it should be dirt cheap to build, and in Japan the cheaper new version was released earlier. About PS4, losses on HW should be very low, it uses affordable components, so taking into account PSN+ subscription and a >2:1 attach rate, and that the largest part by far of R&D costs happened before Q4 2013 (Q3 of Sony FY), its excellent launch and Xmas sales should have brought a nice operating income. Obviously, I'll repeat it again, improved profit margin on HW and large user base meaning excellent SW sales (PS3 is quite regularly WW SW best seller) make me think most of the profits come from PS3, despite lower weekly HW sales.
This said, being easily profitable overall since the start, even by a few dollars per unit, is an excellent omen for PS4, the bloodbath of PS3's first three years (or little less than three, Sony announced it became profitable on HW alone too after more than three years and a half, so it likely became profitable overall some time before, and it will still take a few other years from now to recover initial losses) won't happen again.