In essence it says if you and your entire company can't articulate your top three priorities, then chances are you're spreading yourself too thin and won't achieve the key objectives to reach your goal.
I would say this article isn't just a must read for entrepreneurs, but also for large companies too. My experience with working with large companies is that there is never a lack of great ideas or even entrepreneurial spirit - however, there is a common theme in an inability to execute and 'make things happen'. Organisational structure and politics aside, if the strategic management level isn't aligned in working towards a common focus - then you can bet any amount of money that organised chaos will reign supreme beneath you.
The best idea in the world remains just that, unless you can make it happen.