This is just another gimmick having the split point. Different metal tips (steel vs platinum) are another matter. But the shape of the Y has no benefit.
It's interesting that they show a neat picture with the spark only going to one electrode. Is the other one "resting"??? Do they take turns hundreds of times per second and that it why it doesn't wear out so fast?? If that were true, we would see plugs with 12 way tips that last over 2 million miles.