Cycling in Snow and Ice - Studs and Spikes

Bicycle tyre manufacturers have recently begun to produce studded and spiked tyres as a solution for cycling in winter conditions.  Reviews from riders who adopted them during last years big freeze have been mixed, it seems that that individual tyres are either good in snow or ice, but not both.  This recent news article seems to describe the perfect solution for cycling in snow and ice, with not a stud or spike to be seen!