Being a Thinkpad, Lenovo has made different compromises compared to other similar offerings, as shown in this table (data mostly comes from Laptop Magazine reviews):
|Thinkpad X1||Sony Vaio Z||Macbook Air 13"||Samsung Series 9|
|Display||1366x768 glossy||1600x900 hybrid ||1440x900 glossy||1366x768 matte|
|CPU / PCMark||i5-2520M / 7,535||i5 / 9,936||Core 2 Duo / unknown||i5-2537M / 6,857|
|Battery life||4:11 / 8:00 ||5:35||6:36||5:11|
|Hard disk||Standard||Custom SSD||Custom SSD||Custom SSD|
The battery life in the base model is not as long as other models; the thinking being that people who need long battery life (trans-Pacific flights, etc.) can get the optional slice battery which lasts some eight hours.
What isn't mentioned in the above table is the ergonomics of this computer. This model, being a ThinkPad, naturally has a trackpoint (as well as a touchpad). The keyboard is very comfortable to use and has a backlight.
The ThinkPad X1 is about as small and light as a computer can be and still be a full-sized ThinkPad. Things taken for granted in a ThinkPad model (durable design, standard parts, readily serviceable) end up adding to the weight to the computer, but do not make the computer a burden to carry.
For people who have $1,400 to budget on a small laptop, the ThinkPad X1 is definitely worth a look.
 The Sony Vaio Z uses a technology which combines the advantages of the deeper colors of a glossy display while readable in sunlight like a matte display.
 The ThinkPad X1 has a "slice" battery option which greatly increases the battery life, but increases the weight to 4.6 pounds.
ThinkPad X1 image is courtesy of Lenovo. To post a comment about an entry, send me an email and I may or may not post your comment (with or without editing)