They haven't left the mobile market despite Windows Mobile not getting a large market share.
They bought Nokia. Maybe they'll buy SCE if the rest of Sony isn't doing well. ;)
Btw, making a profit is not the only thing to look at. Companies have different profit expectations, for example consumer electronics business like Sony target ~5% profit whereas tech companies like MS target much higher profit. If they have a segment earning only 5% or less it's not good for their investor's expectations and can negatively affect their stock.








