Well, although it's not technically a FPS per say, if Gameloft could produce a decent enough clone of Fallout 3 I'd be all over it!
My Top Choices: James Bond spy-style Left 4 Dead clone a tech themed TPS in the likeness of Coded Arms would be sweet!!
New idea. Not a FPS, not a TPS, but still staying within the shooter theme. A port (or similar themed game) of Socom Tactical Strike. This game would be perfect, there wouldn't be any control issues, in fact the idevices would be better to play this game on because of the touch screen UI which would make it much easier to command your team.
CODED ARMS ASSUALT FU*K KONAMI!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Left 4 Dead and 007 are cool to