So adding everything up and piecing it together with the conversation that 10K posted with the Nintendo employee(even with a grain of salt). Sounds like the selling point of the NX will be about peep to peer network services to enhance a gamers experience.
Even in the conversation from 10K the employee stated that they didn't view the premise of the NX as a gimmick, but people will. That sounds an awful lot like how people scoffed at cloud computing for XbOne to me and labeled that as a gimmick. Also stating while on paper the NX may not add up to equal PS4 hardware, the end result visually would look similar kind of points further to this system working in this fashion.
I'm also betting that the SCD won't be that cheap, with the selling point being allow your device to be utilized by the network and it will pay for itself kind of marketing. The early adopters alone should be more than enough customers to establish a pretty strong worldwide network experience, but can you imagine the word of mouth selling points this thing will have if they can truly reward gamers handsomely for buying extra hardware?
I think this is why Nintendo didn't want to nail down to the public yet what NX is, handheld, console or hybrid. Because to them when they talk about NX, they state multiple devices and a network of SCD's plus the base unit makes up the whole experience. Just my speculation on how they will sell this device