One thing to note is that this cage design blocks access to the Sony Multi-function hotshoe just in case you're working with the Sony XLR adapter (seen here). The Shark Cage comes with a Top Handle, 15mm Base, (2) 15mm Aluminum Rods, locks for HDMI and audio cables, and enough room to support various lens adapters.
There was a time when many said the DSLR video market was dead. That eventually every ILC HD camera would have built in XLR adapters, ND Filters, adjustable EVFs, and a more camcorder-ish ergonomic form factor. Unfortunately those features are still only reserved for higher priced camcorders and we find ourselves still needing to 'rig' our small camera bodies with external batteries, portable audio recorders, etc. So the need for 'Cages' are still very apparent.
At NAB 2015 FotoDiox shows off a few cage rigs for small camera bodies that still need to mount additional accessories. Aside from a small cage for the GoPro HERO camera, this is a new line of affordable accessories for the FotoDiox company.