Wouldn't that make traction worse on ice? I figure since there would be less surface area is in contact with the ground.
I think Sheldon Brown wrote something similar when he covered tire tread.
Metal studs will change your life if you live in an area prone to ice. Never have to worry about stopping again... willing to bet that with my front brake and studded tires, I can stop faster (on a hockey rink) than your average brakeless hipster on dry pavement.