> We sign the papers because then its enforcable by law. Keyword "enforcable". If the legal system agrees a cryptographic signature on a digital record achieves this purpose then its as good as the paperwork.

I'm a big Bitcoin fan. I think some other cryptocurrencies are great too. But real estate is the most misguided use case for tokens/blockchain. Courts must be able to override a ledger when necessary because the real world is a messy place. Courts cannot just shrug and say "oh gee I guess it is too bad that the defendant has decided not to comply with the court order and execute a blockchain transaction. We will just be angry and impose penalties but the blockchain will remain the true authority that supercedes ours."

The legal system cannot/must not "agrees a cryptographic signature on a digital record achieves this purpose then its as good as the paperwork" -- or, rather, if it does, then it must still remain centralized and operated by a trusted authority. If it's trusted, then you don't want or need a blockchain.