If the only things you care about in a digital camera are novelty and thinness, then the "Paper Like a Digital Camera" is for you. It's a retro-styled toy camera that measures just 6mm thick thanks to its barebones construction -- it's essentially a set of tiny camera components sandwiched between paper parts.
Smartphones don't need to be bulky to offer a camera with optical zoom. Just take the new ASUS ZenFone Zoom, which packs a 3x optical zoom system into a phone that's less than 12mm thick. It's the world's thinnest 3x optical zoom smartphone.
Samsung is reaching out to the smartphone generation today with the release of its thinnest and lightest interchangeable lens compact yet. Actually, to be more accurate, they're reaching out to the smartphone generation with the thinnest and lightest ILC EVER: the NX Mini.
French optical filter company Cokin has launched a new line of lens filters under the brand name Pure Harmonie. The new filters are unique in that they're the thinnest and lightest in the world -- the UV filter in the set measures only 3.3mm (~0.13in) thick!