Later: data sharding, where you're doing the same thing but each Ethereum node only has to store a portion of that data. That will multiply rollup capacity by 23X.
Details from Vitalik here: https://vitalik.ca/general/2021/01/05/rollup.html
The Internet doesn't have built in mechanisms for regulation or fraud and nor should it. Cryptocurrencies obviously don't solve the problem, but can be used to create a stricter set of guarentees than the current sustem.
https://register.fca.org.uk/s/firm?id=0010X00004U9vVAQAZ
> fraud
Just to name two examples. Cryptocurrency like cash won't stop you from falling to fraud or illegal activity but communities and regulations could enforce a safe subset of projects with stronger guarentees than the current system.