I've lived in NYC my entire life, and I've never even heard of New York Ice Cream. Mr. Softee's has always been the dominant (and singular) soft-serve truck. Interesting that someone is challenging their dominance, although I doubt this will play out as well as the dollar-pizza wars for the average pedestrian.
The dollar-pizza wars hit their beautiful height when I walking down 1st ave between 13th/14th a few years ago. I counted 5 in one block!
What a wonderful gift dollar-pizza has been. I often wonder how many able-bodied men and women they feed every day. It's gotta be hundreds of thousands.