A question about cold

A hypothetical what if sort of situation using the full range of Japanime technology. Imagine a Mobile Suit that is able to generate a field, a few meters outward of itself and a few centimeters deep, that stays constantly at absolute zero. Everything that enters this field, as well, instantly drops in temperature to absolute zero. So... what would be the defensive properties of this?

I figure it would make RPGs and flamethrowers useless, but how would a zone of constant absolute zero affect momentum or waves like light and radio? What would happen to everyday objects like concrete or cars that this field passed through?

mebbe.  it might look like a whole bunch of little black dots floating around the gundam, and when something hits them, they get really big, absorb what hits them, and then shrink back into little black dots.  does that classify as looking cool?