LAS VEGAS — Hard to believe, but Lenovo and IBM have sold more than 100 million ThinkPads since the first one was introduced in 1992. The line just got a refresh at CES 2015, led by the all-business ThinkPad X1 Carbon.

Lenovo claims the new X1 Carbon is the world's lightest 14-inch "performance" Ultrabook. At 2.88 pounds, it's decently light, and with a fifth-generation Intel Core i7 processor ("Broadwell"), it's certainly built to perform.

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The 2015 Carbon has new options, including a "super bright" display that can be either full HD or WQHD (2,560 x 1,440) and a PCIe solid-state drive that Lenovo says is 80% faster than standard SSDs (Apple's most recent MacBook Pros also use PCIe connections).

One thing that carries over from previous X1 Carbon models is the thin (0.7 inch) carbon-fiber chassis. Of course, there's also the trademark ThinkPad TrackPoint mouse — that distinctive red dot in the middle of the keyboard. And feel free to try this trick at home: You can fold the monitor all the way down, so the keyboard and screen are flat.

You can configure the laptop with up to 8GB of memory and 512GB of storage (SSD only). Battery life is rated at 10.9 hours.

The 2015 ThinkPad X1 Carbon will be available later in January, and starts at $1,249.