The processor's not the only upgrade from ThinkPad X200. The X201 adds a trackpad where before there was only a nub, and adds a 2-megapixel camera with improved low light performance. It also boots up in 20 seconds and shuts down in just five, about a 50% improvement.
What's missing? There's no USB 3.0, although you do have 3 USB 2.0 ports to work with, including one powered USB. There's no integrated optical drive, if you care about that sort of thing. You're stuck with Intel's subpar integrated graphics. And the X200 features the traditional ThinkPad keyboard instead of incorporating the island-style ThinkPad Edge keys. That's not a downgrade by any means—more just a matter of personal preference.
The X200 can be customized up to 500GB storage with full disk encryption, up to 8GB of memory, a 12-inch WXGA LED display, and a 9-cell battery that yields a listed 11 hours of battery life. The X201s build gets 12.2 hours on a 9-cell battery. Look for the X201 to debut in March starting at $1200, while the X201s base model can be had for $1600. [Lenovo]