It hasn't happened yet but it's a question of when, not if active monitoring of websites for availability and performance will be obsolete. My prediction is that it will happen in the next 5 years though if everything lines up it could be as soon as 2 years away. By active monitoring I am referring to testing a website on a regular interval and potentially from several locations to see if it is working and how long it takes to load (and bundled in with that the alarming, reporting, etc. that goes with it).
via NoSQL databases