MSI are showing off a new concept tablet at CeBIT this week . This isn't just a tablet with 2 screens; the goal of this design is to let you separate the 2 screens and only carry one with you when you don't need the second.
This is one that's going to get all the attention, even though it's vaporware at this point. But if they get it working it will be fascinating.
This model is running Win7 on 10" capacitive touchscreens with an Intel Atom CPU.