As we know that Lenovo will release a new ThinkPad model - T431s, another ThinkPad Ultrabook on this Spring with the quote:
With carbon fiber reinforcement for durability, a newly enhanced keyboard optimized for Windows 8, and introducing the ThinkPad 5-point TrackPad, the T431s Ultrabook™ delivers premium features.
Look like that there is no new for the configuration. ThinkPad T431s has a common specs as:
- Up to 3rd Gen Intel® Core™ processor
- 14" HD+ (1600x900) Anti-Glare Display
- Starting at 3.6 lbs
- Up to 9 hours with integrated 47Wh
- Up to 1TB HDD or 256GB SSD SATA3
- Up to 12GB (4 on board + 1 DIMM slot)
- Dolby® Home Theater® v4
It's lighter than T430s (1.63kg vs 1.79kg), but T430 is stronger with Intel Core M Processor and Graphics Card 1GB. Seem that T431s is designed to go with Windows 8. If you love the new design, T431s is nice. But if you need a stronger mobile notebook, T430s is the right choice.
More details for T431s: http://www.lenovo.com/products/us/laptop/thinkpad/t-series/t431s/t431s-datasheet.pdf