This will be the most easily circumvented DRM in recent years. Their validation servers will be DDoSed, causing the company to release the failsafe they've already made to allow the game to play without an internet connection.
So simple yet effective. After buying the game and not being able to have it authenticate in a reliable way, I return it to the store with a storm cloud over my head. The other thing is what kind of addition to their internet will this cost? I don't know much about the internet, but I assume it will be from each pc little packets, maybe every few seconds. On top of patches, would this add up making the next title more expensive to cover the costs?
It will be interesting to see what happens.