Are you completely oblivious to the contrariness here? Sony's devices make them money, yet you say Sony should abandon them. Rikimaru was sarcastically showing the error in your thinking. Then you argue in favour of MS staying in devices, while saying Sony should abandon them, even though Sony makes far more money from its devices than MS does.
Correct me if i'm wrong
http://www.sony.net/SonyInfo/IR/financial/fr/14q4_sony.pdf
This states that Mobile Communications (cell phones) Lost another 220B yen more than even Financial Services made which is their biggest earner. Their Home and sound lines finally made a profit after many years in the red and that might be a one time bump up as 4k TV's are already hitting bargin basement pricing.
These aren't one time losses for sony , many of these deparments have been loosing money for years. With MS we really don't know how poorly xbox is doing but we certainly know Windows phone is bleeding badly. But the difference is MS makes billions each quarter even with windows phone doing poorly and xbox maybe doing poorly.
Sony's own guidance is a decrease in mobile sales , flat year on year for game and network services , image sales are going to decrease and lcd tvs are expecting to decrease.
If the rest of sony was pulling in billions a quarter in profit a year dispite these segments loosing or breaking even then maybe we could compare it to MS , but as it stands there is no reason too since they are not apple to apples comparisons.