While the boom in the tablet market has certainly seen a gold rush from manufacturers eager to capitalize on the new craze (whether it be with Android or Windows RT), there's an equally-eager market that's attempting to cash in: accessories. Some of them are great, some are bafflingly weird. The PadPivot probably sits somewhere in between. This little thing is designed to fold up and easily slip into a pocket or purse. When you need it, you can unfold it, set it up, and prop your tablet on a makeshift stand that fits comfortably on your knee.
So, it's as normal and useful as a thing can be that's designed primarily to be used by your lower thigh.