Many have asked: will Ubuntu be on tablets? Well, Ubuntu is *already on* tablets.

Kno will soon ship the its $899 Kno dual-screen folding tablet, which is based on Ubuntu Linux. The device targeted at the education market as a textbook replacement. You can preorder today, and the device will reach you in under 10 days.

The tablet has two 14.1-inch screens that fold up like a book. Kno says students spend thousands of dollars on textbooks, and could save dough if using the tablet instead to read electronic textbooks.

A specialized touch interface has been built by Kno for the tablet, which also has stylus input.

Canonical has been pretty coy about Ubuntu tablet plans. Ubuntu used to be on smartphones but the edition was scratched. The Netbook Edition is the closest the distro now comes to tablets.

Canonical has shown a touch interface for future Ubuntu versions, but hasn't said if it is for tablets. Some individuals have also loaded Ubuntu on tablets. So theoretically, it is possible.

If Kno succeeds, Canonical could take notice and speed up the development of a tablet distro. Tablets represent a sort of post-PC era that could redefine the way people compute. It's up to Ubuntu to determine if it wants to stay behind, or move ahead.

A tablet is much like a smartphone, with users doing most of their computing on the Web. Canonical needs to move into the era of cloud/Web-based computing, and it could be important to have a Ubuntu tablet edition for uniformity across the desktop, server editions.

Other details about the tablet: Kno is also offering a single-screen version of the tablet for $599.

The dual-screen tablet weights 5.5 pounds, the single-screen tablet is half the weight. Nvidia's dual-core Tegra 200-series processor running at 1GHz power the tablet(s).  Six hours of battery life while surfing the Web surfing, listening to music.