Here you see what I tried to describe above. Tambour doors are open on the furnace side and the sink side. One shelf in each opening, the one above the furnace is even closer than I thought. Don't store anything heavy on the above the furnace shelf though, bouncing around as you travel could make the shelf move.
Also visible is the tray of mouse bait visible in the lower right corner. Necessary for winter storage up here.
Click the yellow bar to enlarge, hit F11 for even bigger. F11 again returns you to standard mode.
The clear advantage of a tambour door is that it can be wide open without interfering with traffic flow around it. The clear disadvantage is that they do need service with time. Need for lubrication, or even repair of the backing will come to you in time.