Over the weekend, Sony Mobile of Japan announced the Xperia Tablet Z, the second tablet from Sony to carry the Xperia brand. This 10.1-inch tablet will run Android 4.1 Jelly Bean (likely Sony's own build), and runs on a Qualcomm quad-core processor with 2GB of RAM. The previous Xperia Tablet S released last September used a Tegra 3 processor. It will also have a 1900x1200 resolution 16:10 screen, 8MP camera, microSD card slot, LTE capability, and NFC (thanks to the Qualcomm chip). Sony is also touting waterproofing (possibly similar to the Xperia Z phones), though you may remember that the previous Xperia Tablet S had manufacturing defects that affected its water resistance.
The tablet's most notable feature, however is its size and weight. The Xperia Tablet X reportedly is 6.9mm thick, making it the thinnest tablet of any size (very comparable to the iPad Mini's 7.2mm thickness). It's also supposed to weigh 495grams (1.09 pounds), which is the lightest any 10-inch tablet weighs. As a two-handed tablet, that's pretty good. Blog of Mobile is attributing the small size to a 6000mAh battery, though we'll have to wait until the tablet is released to see if Sony compromised battery life for size and weight.
The Xperia Tablet Z is only announced as an LTE tablet for Japanese carrier NTT Docomo, so no word on whether it'll be available stateside. Curious that it wasn't debuted at this month's CES.