I agree that's going out on a limb, a bold move. It seems to me the adoption curve and history of Apple dropping fringe technologies they grow bored with after significant investment by a few firms will keep adoption far below FW rates. USB 3 has supplanted USB 2 for high speed disk access already. That battle is over and done with before Apple has even entered the race. Very high speed external disk access uses eSATA.

For video cameras, it will be USB 3 for everything other than Sony which has its own special precious non-compatible variation Thunderbolt that only works on VAIOs since Sony loves to play the special precious protocol game with their little princess friend Apple.

In 5 years no one will support Thunderbolt and Apple will be on to some new thing. Between now and then there will be at most a dozen devices supported, and all massively overpriced. The failure to adopt USB 3 and BluRay, in addition to their locking down their OS to be iOS with Big Screen will lead to Apple losing significant market share. After the big plunge in a few years, people will say that things all went wrong when Tim "Cost Cutting at any Cost" Cook was foolishly put at the helm rather than someone, anyone, with the slightest design sense, taste, or concern for the customer's experience.