A new cydia tweak has released called 3DBoard. It gives your SpringBoard icons a 3D like effect. The tweak has been developed by Apoc269 and the tweak will be available in Cydia store soon for $4.99.
You can also see the effects via video which is unlike the Nintendo 3DS. Of course you need to have your device jailbroken in order to install this tweak. This tweak uses your iPhone’s built-in sensors to identify where and when to display 3D effects.
3DBoard tweak is going to be available in the Cydia store very soon for jailbroken iDevices.