On the new MacBook Pro models, you can use Target Disk Mode over a computer-to-computer Thunderbolt connection. (We assume this will be the case with future Thunderbolt-equipped Macs, as well.) However, Mac OS X's Migration Assistant software doesn't currently support Thunderbolt connections.

Apple doesn't comment on future products, but it's telling that the company has made Thunderbolt a standard feature across the entire MacBook Pro line--even the entry-level model. The company has said it expects wide adoption of Thunderbolt, and for that to happen, its spread across the Mac line seems like a given. As Apple updates the company's other computer lines over the coming months, we expect to see Thunderbolt added to every Mac model. A more interesting question, though, is...