Presumably, Gaikai support could be added to the device in the future, but for now it's clear that Sony's game streaming intentions (understandably) no longer include OnLive.
Update: An OnLive spokesperson has told Joystiq that VentureBeat's information is inaccurate. Specifically, OnLive was never going to be preloaded into Sony's device in the first place. Users will, however, still be able to download OnLive to the device. Furthermore, the OnLive spokesperson stated that the OnLive controller is still compatible with the device as well.
We've contacted Sony directly to see if we can clear all this up.