It looks like Sony accidentally let a few details about an upcoming Xperia Tablet slip today. According to an appearance on the official Xperia Lounge application, the tablet is (predictably) called the Xperia Z4 Tablet and features a 2K display, along with an "ultra fast processor."
The post has since been pulled, but not before the folks at Xperia Blog managed to snag a screenshot showing off a side view of the tablet, pictured below.
There wasn't much else revealed outside of the references to the display and processor. However, the post does note that the tablet will be shown off during Mobile World Congress on March 3. In any event, keep it locked on Android Central for much more coverage from Barcelona next week.