I like this idea of no lines between work and play. As opposed to the image of "well-rounded" as a pie divided into different slices or categories, we should probably be using a venn diagram.
As risky and as scary as it may sound to live a life where you seem to have so many things on your plate and without the security of a job with regular benefits and vacation time, it seems to me that this way of life actually has potential for building a more solid foundation and for making us all happier and better connected. In this way, we rely on each other. There are no boundaries! We should always be looking for ways to collaborate and help each other in the world. And think of the potential! If we continually move along to where we can contribute our best effort, the actual output and quality of our work over a lifetime will be much greater than if we spend our life finding ways to fill our time at a 40 hour a week job.
So, does this scare anyone? Living your life project to project is a risky thing! It probably should scare you. And maybe that isn't such a bad thing. Most likely, living on the edge of failure will actually propel you to work harder to succeed. What risks have you taken lately?