I found this puzzling device on Jalopnik.com, along with some parodies of its inevitable use with laptops:The Laptop Steering Wheel Desk, new from Mobile Office, allows the user to attach the device to his or her steering wheel. The company intends its use for writing a note or snacking on some lunch in your car, but it can also accommodate a laptop. The product description covers the company's hide, of course, by stating: "For safety reasons, never use this product while driving."
I feel like this device is troublesome at best and disposable at worst. Sure, people want to conveniently eat while driving or perhaps jot down an idea or two that they have, but driving has become less and less of a focused activity. With cell phones, stereos, screens, and other gadgets to distract our attention, why even give the option of a desk? It's hard enough to focus on driving when you want to eat, let alone if you're using a computer! Mobile Office may have given a warning, but people who would spend $25 to purchase this are the same people who would consider multitasking so irresponsibly while driving.
Constraints would serve this interface well. If the size was perhaps smaller, not fit to allow the weight or length of a laptop, then perhaps people would be encouraged to use it in the intended manner. Regardless, a puzzling idea.