Comment by fsflover

Like using your phone as a desktop computer, when it's connected to a screen and keyboard and runs a full desktop OS. Having a full access to all desktop apps, development environments. Also this, https://news.ycombinator.com/item?id=49201496.

Also, choosing the OS means freedom to choose the interface you like or develop your own (or to pay somebody to do that for you). Freedom to not be in walled gardens.