Based on the report from Android Police, HTC is planning to release a smart cover/keyboard accessory similar to Surface touch/type covers for their upcoming Android based tablet.
This accessory measures approximately 228 x 320 x 5 mm, making it a very thin keyboard. The actual keys are apparently around 3mm high, and it seems that the key pitch is around 15mm. It has a standard QWERTY layout plus “Android function keys.”
As you can see from the image above,
“the segmented areas of the cover flap will fold up into a triangle using magnets, supporting the tablet while it is propped up to use the keyboard. When not in use, the tablet will evidently nest into the case on top of the keyboard, with the segmented flap lying over the screen (the magnets will also automatically wake/lock the screen like current covers).”
via: Android Police