Basically Shitcoin on Bitcoin. This rollup stuff might bring us all Ethereum Shitcoins to Bitcoin. This could indeed be the next big hype. 

Somehow good for Bitcoin, as it will once more everywhere be talked about. But somehow bad because this are Shitcoins and after the buble one might think it is Bitcoins mistake.

We will see. Personaly I am very pessimistic to this development. But open to be convinced for better. Bizcoin really needs privacy.