Michael Tanner is good on this–and the rest of the speech–today:

For example, as he has in virtually every appearance he makes, the president repeated “Nothing in this plan will require you or your employer to change the coverage or the doctor you have.” He even repeated it. “Nothing in our plan requires you to change what you have.”
That of course is quite simply untrue. The president favors a requirement that everyone must carry basic health insurance. But the individual mandate that he favors and included in the bills before Congress doesn’t just say you have to have insurance: It specifies what benefits your insurance must have, even if you don’t want those benefits or they boost the cost of your policy.