I felt that the D&S had a good model of what could be done for a Wikipedia page. There have been a lot of times I was just browsing through the site and chanced on something I knew nothing about but found interesting. There was a good balance of something a railfan would find interesting, as well as one of those casual readers. A lot of museums have some bland information stating date after date after date, and it isn't something I want to delve into in my spare time.
Doris Osterwalds books were great because you could read one casually, but there was still more technical geographic and railroad information you could get deeper into later if it caught your interest.
Someone perhaps researching a vacation may use Wikipedia, simply because so many of the tourist information websites are so clogged with advertising and deals and packages that you don't get a sense of where you're headed if you've never been.