Take it from me, the bed will soon be full. The saying around here is I need 2 weeks notice for anyone who wants to stay overnight. It will take that long to find the bed. I like the idea of making a cutting table that could fit over the bed. Just be sure it is high enough so you don't get a backache. Shelving that will hold clear plastic boxes for notions would be good. Pegboard to hang all your rulers, cutters etc.
enjoy your new room