3 of 4Image
Among the list of updated machines is the Lenovo 310 Touch, a revamped version of the U310. The device has a 13.3-inch display, measures in at just 18mm thick and has, Lenovo claims, a wake-up time of less than one second.
The U410 (pictured) is similarly svelte at 21mm thick and has a slightly larger 14-inch screen. Despite the difference in screen size, both offer a maximum resolution of 1,366 x 768 pixels.
The U310 and U410 were first released during 2012 but both are now available in a Touch model that supports 10-finger operation and gesture controls.
Under the bonnet, the U310 Touch and U410 Touch's hardware can be specified by the buyer, but can include third-generation Intel Core i7 processors, up to 1TB hard disk drive, integrated graphics and up to 8GB of RAM. Lenovo said the U310 has around six hours of battery life whereas the U410 can eke out eight hours.
UK pricing was not available at the time of writing but in the US, the U310 should start from around $780 (£465) when it goes on sale in March 2013, while the U410 will be available from around $850 (£528) in April.
Alongside the revamped ultrabooks, Lenovo also added touch-sensitive screens to its Z400 (pictured) and Z500 laptops, both of which start at a slightly lower price than the U310 or U410, priced from $700 (£435).
Like the U series, the IdeaPad Z400 and Z500 displays now support 10-point multi-touch input, third-generation Core i7 processors and up to 16GB of RAM.
Other key specs include multiple USB 2.0 ports, USB 3.0 and HDMI output and dedicated graphics in the form of an unspecified Nvidia GeForce graphics card.
Both also have Dolby Home Theatre v4 support and offer a backlit AccuType keyboard.
With both devices offering largely the same specs, the key difference between them is screen size: the Z400 offers a 14-inch display where as the Z500 (pictured) has a 15.6-inch display. Whichever buyers opt for, the maximum resolution of the displays is 1600 x 900 pixels.
The Z400 will be available from March and the Z500 should go on sale in April, Lenovo said.