If there is one area we hope to see Windows Phone grow in 2013 it's in third party accessories. Nokia's Lumia phones have the best chance of that since they're quite pervasive and well known as far as branding.
Redditor l1v32r1d3BmX (catchy name, dear sir!) has serendipitously discovered that those iPhone lens attachments (which work by magnetic adhesion) also happen to work on his Lumia 920. The attachments are made by a few companies--a lot coming from China as cheap knock offs--allow wide-angle and macro enhancements to the built in camera. As it happens to be, the Lumia 920's camera housing is magnetic, which is either due to design or perhaps the optical image stabilization (OIS) setup.