While we have seen many real-life images and even hands-on video of the long-cancelled Lumia McLaren prototypes leaking earlier here is one video that offers best look at its cool UI features. Lumia McLaren was supposed to come with 3D-Touch UI. We have seen the prototype images, comparison with iPhone 6 and even a hands-on video of Lumia McLAren earlier.
This video demos how the MixView or FlyOut tiles feature and 3D Touch was supposed to work on the cancelled Lumia McLAren. The MixView feature really looks useful and Microsoft has recently patented it. May be we can see it on a future Lumia / Surface smartphone.
Thanks Vicky Mhatre for the tip. Cheers!!