Someone, presumably at one of Foxconn's Apple-contracted foundries, took a picture of what they claim to be the front fascia of the 5th generation iPad. If true, it only supports the rumor of the next-generation iPad design being simply an upscaled iPad Mini.
Unlike today's 9.7-inch iPads, which have uniform bezel thickness framing the screen, the next iPad could feature thicker bezels along its breadths, and thinner ones along its lengths. Joining the dots, one could also speculate next-gen iPad's back to look more similar to that of the very first iPad, with sharper edges, and an overall flatter back.
There are different theories surrounding Apple's next iPad unveiling. Some put it just before Summer, along the sidelines of WWDC '13, other in October.