think it would help to re-read the part you quoted...

use the SD port for also allowing digital camera photos to be offloaded onto the Karma if the user has an SD camera

So it looks like he was saying it would be nice to use the (comparably) massive storage of the Karma to store pictures they had taken with their SEPERATE camera. Thus allowing them to take more pictures before having to go home / to the hotel / pull out the big laptop / etc...