Here's my prediction: Origin gets its few exclusive titles, Origin then becomes more irrelevant than it already is because nobody wants to pay EA their full 60 bucks and everyone buys from Steam, D2D, or Retail instead (Depending on the particular title). The End.
You might ask yourself now, "But what about the small percentage of the PC Gaming world who don't pay attention to things and DO buy EA's games from Origin?!" Well, sure, there are some people who would buy a few things from Origin, but because anyone in this boat would already know about Steam, they wouldn't get anything they didn't have to outside of Steam.
You might also ask yourself as a follow-up "But what makes you so sure it's such a small part of the PC Gaming community that would buy through Origin?" To which I say, how many people with computers good enough to run Battlefield 3 wouldn't be informed on the gaming industry? And the poll results on this thread alone supply adequate information for me to know I'm right.
Nobody bought games through the EA store unless there was a ridiculous sale (Like when I bought Bad Company 2 for 20 bucks when it was still damn new), and nobody will buy games through the Origin store barring the same exception.