Somebody snooped behind the covered signs at MWC and discovered one advertising the Galaxy Note 10.1. The Galaxy Note 10.1 was already outed by Samsung earlier this month.
The photo above looks a lot like the Galaxy Tab 10.1 and I am willing to bet that it will have the same specs or almost the same specs as the Galaxy Tab 10.1 with the addition of the S-Pen. The S-Pen is very nice. It uses Wacom technology and is pressure sensitive.
It should be announced very soon at Mobile World Congress this week.
Update: Much better picture of the sign