Good question. I look at it this way, low cost & programmable. It's not open but for the cost and utility this outweighs doubt. I also look at small hardware, stuff that's cheap and hackable. So for the price of a card + usb power source you could have a portable web server. Think about that.

there are cards called Eye-fi that have done wireless for a few years now but they only sync across photos from a dslr/camera to your computer or mobile phone