That's not the same thing as the '!w' feature on DDG or the 'w' keyword bookmark. Once you Google 'wiki <search>', you have to click on the first link. Unless you set up an IFL search, in which case you might as well set up a Wikipedia search.
When you set up IFL search, you can use it for wiki, imdb, documentation, projects' homepages and dozens of other sites that you know you will find in the first spot. I have IFL as my default (w/o keyword) search. When I'm not so sure I just use keyword search (g for google and few others (but not wiki or imdb)).
Which is exactly what my keyword search does. For example, if I type 'w hacker news' into my location bar, I'm instantly redirected to https://en.wikipedia.org/wiki/Hacker_news
