Anything can be a desk if you try hard enough to make it a desk. I wrote my masters thesis on a piece of wood that was sitting on a radiator, for example.
Over the years, I’ve used my knees, my couch, my bed and a bench in the boxing room at the gym as a desk. All that changed when we bought our house and set up my office, though. I promptly bought the Pottery Barn Printer’s Keyhole Desk, which is one of the best purchases I’ve ever made. And after a couple of years of heavy use, I’m reviewing it today!