[tjoff]

I tried to address that in my post. Installing a browser is just as much a commitment right?

Installing spotify is a commitment, but if you already have spotify playing a song in spotify isn't a commitment even though that means that spotify will have to look it up and download it for you.

Yes, you already have a browser installed. But soon you will most likely have a "market" installed as well (in a few years you probably have to actively avoid it if you don't want it bundled with your OS). The market just have to make a distinction of apps that are "light" and doesn't bloat the system. It could even remove it automatically after x days of not being used. Similarly to how spotify would cache a song you downloaded. Or a browser does... (hello html5 and local storage)

Compare with smartphones where they did this distinction by calling applications for apps instead.