Is Microsoft Testing a New Keyboard for Windows Phone 8

According to several reports and a bunch of leaked images, Microsoft may be testing a special arched keyboard for use with Windows phone 8 devices. A keyboard that makes typing with one hand/thumb easier on touchscreen phones. 

This special arched keyboard surfaced due to a leaked Microsoft Research presentation and appears to be a one-handed soft keyboard for Windows Phone 8 that Microsoft has been testing for a while now.

There are no keyboard replacements on the Windows Phone interface as of now, so a keyboard of said nature might be welcomed well.