Yep, great concept. You can do this without evernote, and you can do this with apps that do a much better job of allowing you to get stuff out. Evernote did not create the ability to do this. You are very confused.
Confused in what way? Evernote didn't create the ability to do this but they offer an excellent cloud service which is seamless across multiple platforms including Android and iPhone. Their applications are stable, thoughtfully designed and constantly improving. The paid service is very reasonably priced and opens great possibilities for collaboration. If there's something better out there, please tell me.