The KDE Vivaldi tablet has already had a long history and was formerly known as the KDE Spark Tablet. It turns out that on the same day as Canonical announcing their Edge smart-phone, the first KDE Vivaldi tablets happened to be shipping.
KDE's Aaron Seigo wrote today on Google+, "The first Vivaldi tablets, new dual-core engineering boards and the custom EOMA68 developer workbenches we commissioned have all been shipped out. Don't get too excited: the tablets are pre-certification (EC/FCC) and are on their way to us so we can verify the Q/A targets we set out."
The Vivaldi tablet has a 7-inch (800x600) display, 1GHz ARM Cortex A9 processor with Mali 400 graphics, 1GB of RAM, 8GB flash storage, and 1.3MP front-facing camera. The Vivaldi software is using the Mer Linux platform with the KDE Plasma Active desktop. The at-launch target price is still around 200 EUR when it finally ships to customers.