Here’s an interesting concept. It uses swipe as seen in the N9′s swipe UI but not on the screen itself but on the home button which has now become a slider switch.
If it’s easy enough to swipe with feather light touch, perhaps?
Inspired by Windows Phone, the swipe of meego harmattan and the Nokia 5610, sWIPe use a slide button to bring more navigation posibilities to WP8, the new notification center and the improved multitasking screen are available with a simple slide, switch between apps is very easy too. This project is the idea of Dario Gainnash and Il Matti with the Omar Pirela collaboration in the 930 S 3D model and the graphic animation.
There’s a video below so you can see it in action.