Pricing for Asus' Vivo Tab RT will start at $599, and the Intel Atom-based Vivo Tab will start at $799, according to the roadmap . Optional keyboard and trackpad docks, which transform the tablets into laptops more or less, will reportedly cost an extra $199. This raises the total price of the Vivo Tab RT to about $800 and the Vivo Tab to $1000.

Of course, we don't know if the roadmap is legitimate or fake, but the details it shares are difficult to square with reality. First, Asus' official press materials suggest that the Vivo Tabs' keyboard and trackpad docks are essential, and will be included with the tablets. To quote directly from : "Key to the Vivo Tab's recipe for Windows 8 is the supplied mobile dock."

Then, later in the same press release, we find: "The Vivo Tab RT also has the same innovative Transformer design as the Vivo Tab and is supplied with its own mobile dock that provides a QWERTY keyboard, track pad, USB port and built-in battery."

I could be misinterpreting Asus' definition of "supplied," but it seems unlikely that Asus would relegate a main ingredient in its product to optional add-on status. Even if including the dock raises the overall cost, it would help sell the notion of Windows 8 tablets being two devices in one, and would make the higher pricing easier to justify.

The pricing listed in the ostensibly leaked roadmap also fails to square with what other manufacturers have said about the cost of Windows 8 hardware. Last month, Lenovo's head of North America operations, David Schmoock, that Windows 8 tablets will cost between $600 and $700, and that Windows RT tablets will cost $200 to $300 less than that.