After yesterday's mild rant about the revival of 35mm film, here's a much more interesting story about the relationship between social media  and urban art. (Disclosure, my Instagram feed is full of murals signed with hashtags and account handles).

20 years ago, a street artist was considered an outlaw. At best an underappreciated creative, at worst a vandal with a spray can and a paint brush. 

Today, this is a business with production values in the tens of thousands of dollars - much more if you are sponsored by Adidas, Nike or New Balance. 

In short, the story of how digital marketing appropriate street art is the story of how hipster culture took over the urban world, and the gentrification of our 21st century cities. Have a read.