Lol. It sounds just like a primary school teacher!
Anyway, I think I'll still be getting a PSP at some point, more for Tactics & Crisis Core than for Agito (this might change once I actually know what Agito is about).
About Sony losing money on DS, I doubt it. If you look at their Financial Statements for 2007-2008, they made an operating income of 8800 million Yen on their Offline Games Division. Even after other expenses, their profit is around 8000 million Yen. And the vast majority of that Offline Game Division was DS.