In April Nvidia has filled trademark for Tegra Tab in the United States which hints us that Nvidia is working on a Tablet.Now the images of tablet has been appeared on Chinese website but we got to see only back of device
From the images it is cleared that back pattern of tegra tab is similar to Nexus 7 with texture and matte finish.
The device comes with 7 inch display and we can even see a micro HDMI port,USB interface,Sim Tray and Audio output jack and the presence of 5Mpx camera
The same sources said that tablet is being manufactured by Shenzhen Granville technology which in past announced that they are working on tegra 4 tablet with stylus.
So it may be possible that tegra tab comes with Stylus input
Unfortunately other specifications of device is yet unknown but it may be expected that device comes with 7 inch display with 1280*800 resolution and Android 4.2.2.