Dont flame me for being a nintendo fanboi, because this isnt my goal.
As far as the games you mentioned, i wont go there, since i lack a PSP.
And comparitively, with it starting with 250 and the DS for less, to most it didi "cost a ton out of the gate".
You cant assume what other companies would have done.
Lastly, I have heard (cant confirm) that thier is a add on that allows the DS to play music (movies i hear too) so that it does as much as PSP for less.
Also, the DS has made enough money to release a updated,better verison called DS lite.
I have yet to hear of a release of a new PSP system.