From commenter austinexpat at The New Republic's blog, The Plank:

By choosing to cast his campaign as a "movement", Obama may be jeopardizing his ability to act as a "mere politician" if that turns out to be necessary. "Forget everything I said about Hillary Clinton being part of the problem, and go vote for her"? How many of those people shouting "YES WE CAN!" on cue are going to be ready to hear that message? When you've promised them a ticket to Paradise, how many people are willing to accept Sheboygan as an alternate destination? (My italics.)