Other than that, this is basically the same X1 Carbon already on the market: a 2.8-pound carbon fiber machine with an optional 2,560 x 1,440 touchscreen and Intel Core processors running under the hood. (These are Intel's fifth-generation Broadwell processors, which will probably see their formal debut here at CES.) As for configuration options, you can get it with either 4GB or 8GB of RAM, along with either a regular solid-state drive (128/180/256/360 gigabytes) or a faster PCIe-based SSD (256GB or 512GB). Finally, you can get it with an LTE radio, in case you don't want to be at the mercy of nearby WiFi hotspots. Look for the updated X1 Carbon to land this month, starting at $1,249.

Lenovo also made some changes to the rest of its ThinkPad lineup, from its other Ultrabooks to its lower-end business notebooks. Starting with the ultraportables, the 12.5-inch X250 replaces the X240, while the T450s is an update to the T440s. At 2.88 and 3.5 pounds, respectively, both are ever so slightly lighter than the machines they replace. Both make use of Intel's new Broadwell processors, as well as Lenovo's existing "Power Bridge" technology, which combines a built-in battery with a swappable one, allowing you to insert a fresh cell without shutting down. Additionally, both will be offered with a choice of spinning, hybrid and solid-state disk drives, along with an optional backlit keyboard. The main differences are size (obviously) and screen resolution; as the larger of the two machines, the 14-inch T450s starts with 1,600 x 900 resolution, whereas the X250 comes standard with a lower-res 1,366 x 768 panel, though both can be configured with a 1080p touchscreen. These also go on sale this month, with the X250 starting at $749 and the T450s going from $999.