Lenovo shows off second 10" Tegra 3 tablet, the IdeaTab K2

As we said, it has many of the same specs as the S2, including the 10" IPS display with a 1920x1200 resolution, a quad-core Tegra 3, and an 8 MP rear camera. One interesting feature that sets the K2 apart is a fingerprint scanner on the back of the tablet. The obvious use for this is for biometric security, but there is also word that it could be used to control a mouse cursor, but that seems a bit unnecessary with a touchscreen device that will likely have a keyboard dock with trackpad. 

source: Engadget