To compile a list of all currently known uses for blockchain and its effects and debate the pros's and cons.

Firstly a couple of refereneces

http://radar.oreilly.com/2015/01/understanding-the-blockchain.html

http://wpengine.com/blog/block-chain-could-be-bigger-than-bitcoin/

To start the ball rolling

1 Real property ownership use easements , mortgages encumbrances and leases ..reduction in Court cases on ownership claims easier ability to demonstrate ownership and provide "unquestionable" documentary evidence

2 Stock / share bond ownership/ transfer and dividend records

3 Births Deaths marriages divorces  children... Clear unambiguos and hard to contest or fake records + instant and inexpensive in labor and cost access

4 Licensing records  drivers/ business permits

5 general property ownership leasing and mortgages..  boats Cars commercial vehicles  planes

6 Citizenship status Passport records  ...travel history

7 Credit history 

8 Government  income and expenditure.. tax records

9 Business revenue /expenditure and profitability/ dividends

10 Cost analysis and monitoring of vehicle fleets transportation costs..Order dispatch  location and delivery tracking and confirmation.

11 Insurance premium/ payment /claims records

Please add whatever else you can think of