Up on the left, you see a set of rather stylishly simple coat hooks, the double hanger both familiarly traditional yet modern and sleek. On the right you see the same hook in its naked form, a powder-coated strip stamped from a sheet of steel and measuring a svelte 0.4mm thick (a mere 0.016 inches).
Keeping to the minimalist theme, the coat hook is called simply "coat hook". The flat form means that these can be stacked and shipped cheaply, and simply twisted and screwed to the wall upon arrival. Sadly the design, by Nicola from Bern, is only at the prototype stage, but these are so Ikea friendly we wouldn't be surprised to see them on sale soon. We even have a suggestion for a punny (and terrible), Ikea-style name: Meebius.
Product page [Nicola from Bern via Core 77]