The main key feature of the cancelled McLaren device was being able to interact with it with minimal contact/touch to the screen. Little is known why this phone was cancelled, but some of its features has found its way to your existing Lumia device.
The Gestures Beta app, (which is obviously still in beta) brings some of these features...
With Gestures you can control some of the functionalities of your phone without touching the display. Our first release will enable you to control calls and silence your phone conveniently. You can: - Answer a call by picking up your phone and putting it to you ear - Mute your mic during a call by placing the phone on a flat surface with the display facing down - Put the call on speaker by placing the phone on a flat surface with the display facing up - Silence the incoming call ringer by flipping device display down.
Here is a quick video demo-ing what it can do. Also, please ignore the other side of the phone in this video:
As you are aware some of these functionality aren't new to us, remember the flip-to-silence is a feature we are already familiar with, as it was introduced with the N9 a few years ago.
But I have to admit, I am impressed by the "put phone to ear to answer call" function, looking forward to seeing more McLaren features in existing and future Lumia phones.
Maybe Microsoft made the decision about cancelling the McLaren because making a phone that would have these features was unnecessary since they could easily embed them into current Lumia phones and needed no special hardware? If this was the reasoning behind the cancellation then it is a damn good one.
You can download and try out this new Gestures app from the windows phone store: