[faboo]

It depends on how you've packaged your application. Technically, yes, the user needs NW.js to run your application, but you can ship with NW.js if you like (it's just one fat executable). When NW.js is run, it looks for a NW.js app to run in the working directory, so all the user needs to do is run the NW.js binary you provided and it will launch your app.