In response to jgarzik Fidelity chicken and egg. Using the blockchain to store large data is not impeded by the limited block size but by the uncertainty of future cost to write that data to the network relative to the value the data represents.it's important to lift the limit now to allow newly formed organizations like this the freedom to choose how they want to apply blockchain tech:
http://www.reuters.com/article/2015/09/15/us-banks-blockchain-idUSKCN0RF24M20150915
A business needs to have control over the cost of the technologies it uses in its business. The abuse Core developers fear is a considerable business risk that's managed by the existing incentive scheme.
Document hashish is and has always been a fair application it's much like a receipt.