OS X Default in March
It's taken a lot longer than originally expected... but, according to The Register:
Phil Schiller, Apple's VP of worldwide marketing, has gone on the record to suggest March as the date when new Macs ship with OS X as default.
This will mark the final step in transition to OS X. Application developers will have even more incentive to push for native OS X support once this step is finally made. I only wish it could come sooner...