This seems to be comparing apples and oranges. If your goal is fun, build an app. If your goal is money and freedom, build a business. Sure one _might_ morf into the other, but if you have a goal, work towards it, don't just hope to stumble into it.
From the article itself I couldn't agree more on "The ultimate resume". A passionate developer with a lot of cool tiny projects (as his playground) can get plenty of job offerings - as long as the ideas show potential and are executed well. Also, as Sahil mentioned, one of the projects can start small but grow into a big successful business.