its not really mimicking, its just that it got an upgrade on the graphics that makes you think its a dumbed down version of the consoles.
what handhelds should have is that the games theirselves to be easy to pick up , but still deep enough to have their own identity, like Pokemon , see that game is long and has lots of grinding, but also a very easy game to figure out, there is no long as hell tutorial or the "Go to the end of the world to save the game" mechanic that is common in sandbox games, thats what handheld games should be like, another example is Peace Walker, while that game is actually a full blown Metal Gear , its pretty easy to pick up and play, and also encourage you to play short bursts more , same goes for The Last Window and Dissidia.
Also i hate to sound like a troll but a lot of people here think its cool now that Nintendo have console like experiences on the go while its not cool when Sony did it on PSP, it is pretty ironic, but like i said, its not about "Ohhh console dumbed down! means crap!" its about the game being acccessible on the go, there is a certain charm in handhelds that Console only gamer will never know and keep ignoring until they stop being graphic whores and actually give it a chance.