Saw these sizes on a 7 in France a couple of weeks ago. Have to say, it looked a bit too big on the front and out of proportion with the cycle wings!
Also, will it actually give a bigger contact patch? Obviously the tyre is wider, but as the pressure is spread over the width, what you gain in width you must lose over the length of the contact area?
I'd also expect to feel a lot more 'tram lining' with wider fronts.
Beaulieu #28