How would you build a D-pad (i.e., a discrete joystick with 5 states: center/up/down/left/right) where state can be sensed wirelessly with an RFID reader? What might the advantages and disadvantages of such a wireless joystick be?
What are some concerns people have about proliferation of RFID (or NFC) tags? Can those concerns be addressed with technology or not?
Can't change a rubric once you've started using it.