Concept: Coverflow multitasking for iPhone

Face it. Sooner or later, Apple will add multitasking for third party apps to the iPhone, even if in a very controlled way. The 3GS has more than enough RAM for it, so i think come iPhone OS 4.0 we will finally see something.

Problem is, how will Apple implement it? Well, look at at concept showed above. It´s pretty much what i want.

Granted, like it´s said on youtube comments, there´s already an app called Kirikae for jb iphones, that allows multitasking/task switching (together with backgrounder), although without this awesome interface. So, can the jb devs implement this (yet again) before Apple?