This type of long, scrollable design seems to be growing in popularity these days -- e.g. the NYTimes Tunnel Creek article [1] or AirBnB's annual report [2], and I think it's a good trend. Even though this NPR page has less special effects than those other two examples, it's still a fantastic reading experience, and I'll take it over a standard paginated article any day.
[1] http://www.nytimes.com/projects/2012/snow-fall/#/?part=tunne... [2] https://www.airbnb.com/annual/