Sony just added PSP downloads to their site! As you can see in the picture one of things they'll have are games! So people with all firmware will atleast be able to play those :Jump: ! They already have game trailers and screens. They added something for almost every game/movie of those!
EDIT: Link to PSP downloads (runs perfectly in PSP browser, plus you download stuff directly to your PSP in the browser!) Here's the link:http://www.us.playstation.com/mp/player.aspx?media=PSP