yes but they don't need a new controller.  Bigger worlds, better AI, better multitasking, more enemies on screen, titan levels (specific but still mind boggling).  Not that you insinuated otherwise just pointing it out.

reminds me of the mobile phone in GTA IV

Glad to hear a developer not bring up something like graphics.

I HATE hearing a developer go. "this can ONLY be done on this system" When the ONLY thing that prevents it from being on another console is a few extra polygons. To me a few extra polygons doesn't make a game.

Quick example would be Wii Sports Bowling versus say a bowling game for 360. Obviously Wii sports "COULD" be done of 360 graphics wise. But I think we can all agree that its the remote that makes the game for wii sports.

I hope this gamepad really does add to the experience of Lego City.

But as I said I HATE developers going "so and so game can't be on said console because of graphics" Look at Witcher 2. This is significantly better on the PC than on the 360. BUT graphics ONLY. It easily playable on the 360, just need to lower details, visuals. There isn't something making it unplayable on 360. It's just a visual look.

As someone else mentions, AI, physics, ect are all great additions to more powerful hardware, but for most part its not those aspects holding a game back.  You lower visuals enough and you can still attain those same AI, physics, ect.  Any person with a computer knows this.  You take a game and put max settings and you can get say 10 fps, basically unplayable.  Lower setting to lowest and you get 100 fps.  These settings aren't making the Ai or physics or other aspects of the game lower.  Its just lowering lighting, shadows, resolution, details, ect.

No Analog

The only real thing that it would lose is exclusivity. Which seems to happen a lot to Nintendo.

If that is the only thing it could loose, why don't you ask Fronzenbite to port Trine 2 Director's cut as it is to the other consoles! They did say it can't be done.

Why would I ask them to do that?

(next to) no one would buy it. They even scrapped the WiiU exclusive DLC. So it can indeed not be done because it wouldn't make them any money :P

AFAIR they said they can't update the graphical improvements from the WiiU version, but they aren't that big as it still looks worse than the PC version. (Half-Life 2 on 360 was a true updated version that looked better in some parts than the PC version for a few years (mostly because of HDR), until Valve finally decided to update the PC version as well)
http://www.eurogamer.net/articles/digitalfoundry-trine-2-face-off

So yes 1080p on PS360 might not be possible, but then again it's basically the same game so they could very well port the one exclusive level and update some effects without much if any FPS losses.