Dan Ackerman/CNET

LAS VEGAS--Spotted at the Samsung booth at CES 2013 was an updated version of the company's Series 5 Ultra, a slim, midpriced ultrabook. Not getting a formal announcement, as the more high-profile Series 7 Ultra and Series 7 Chronos did, the updated Series 5 instead sneaked onto the show floor.

The new Series 5 will add a touch screen and backlit keyboard, and the overall design of the aluminum chassis is thinner, but still thick enough to hold an optical drive. The brushed-metal look is closer to the more expensive Series 7 and Series 9, making this look like it costs more than its $749 starting price.

The new Series 5 Ultra will be available in February in black, red, and pebble blue, with a Core i3 version starting at $749 and a Core i5 version for $899. AMD graphics will be available in some configurations, but probably not in the U.S.