I'm all for a block size increase to 2mb. I just think that 8mb, as proposed by BCash, is too much, and will create more problems in the future, such as centralized nodes.

Lightning network is just one of many sidechains, and one which will atract institutional investors. I hope that in the future we will have lots of different sidechains, each for a function: one to buy a coffee, one for settlement between banks, one to buy cars, one to buy real estate, and each will have its own limits, and its own fees.