Aside from the larger screen at 14-inch (Toshiba Libretto has 7-inch only), It also coming with a strong specification of a mid-stream notebook PC, such as Core i5 2.66Ghz, 750GB HDD, USB 3.0, Bluetooth 3.0 and HD Display. The keyboard has been substituted with Virtual keyboard that might need some learning curve before you can fully adapt to the new interface.
There is no full details released yet and we have no idea when Acer is going to officially release this Iconia Dual screen tablet.Hopefully, it would be released soon enough in this year.
Engadget has got themselves the Acer Iconia! Here is the video:
Head on over to Engadget for more details.