See Microsoft’s full Pre-Touch Sensing for Mobile Interactions presentation on the Nokia McLaren (video) by Surur Davids activearticles, Device, News, Windows Phone
New Documentation for Mixview in Nokia McLaren, Lumia 940’s 3D Touch leak: Updated with another image by Surur Davids News, Windows Phone
There were 2 versions of the Nokia McLaren, and they were in development as recently as April 2014 by Surur Davids News