Remember the patent for the Supplemental Computing Device? If I remember correctly, it stated the potential to license out your SCD to others and get reimbursed. If any NX device can act as an SCD than that could their way of shaking up hardware pricing.
It would sorta be the hardware version of My Nintendo since games are still the same price, you just accumulate points by purchasing games.
Refresh my memory - what is an SCD?
Here's a great explanation of what it is and what it could be used for: