Here's some more food for thought.
The specs that have been released so far (what has been shown on their website) are the only confirmed specs.
Does this not indicate enough, that they are still locking in all of the other hardware?
Marc and Stefano have verbally confirmed their ability to rapidly deploy their OS to other hardware (24hr adaptation was referenced inone interview) and with Key hardware components taken care of, I doubt that leaving "peripheral" choices to much later will be an issue.