The first gen units were a pain to have around if they weren't mounted to the unit. And when they were mounted to the unit they doubled its thickness and added 3/4" in length so if was a pain to keep in a pocket. I would use the camera and then throw it back in my bag because it made the phone to big.
The second gen units are the size of a box of matches. They snap in quick, get the job done and store well. To repeat: it is very small and not bulky when being stored.
The modules in the article remind me of the first generation units. Imagine carrying around a piece of equipment 3"x5"x1/2" which you have to be relatively gentle with it. Your bag will be full of accessories that you *might* need.
I went to a smart phone because it consolidated the function of several pieces of equipment (phone, ipod, camera, GPS, gameboy, note taking, web browsing, etc). This company wants to physically bulk up the phone and the accessories I have to carry. Nice idea, to much clutter to carry around.