about that gambeoy versus nintendo ds thing
everything that nowadays has cables to connect to something else or has slots to push in cartridges, cds/dvds/..., casettes, usb sticks(generally anything that nowadays has usb), magnetic bands, drives, ...
all that has network/matrix/mesh/wifi capabilities
in adition everything that would be convenient to remotely control has matrix capabilities probably even the streetlamp which can be turned on or off by the authorities via the matrix...
in a sense nearly everything that is electronic
except! for the stuff that paranoid people stripped (or built) off their wifi transmitter
examples
washing mashine: hackable
oven: hackable
street lamp: hackable
mp3 player: hackable (although in most cases this would eb your commlink)
front door: hackable
intercom: hackable
traffic lights: hackable
electric grid: hackable
ceiling lights: hackable
building wall: not hackable
cereals: not hackable
your oldschool roommate hackers vintage usb drive he keeps all his private stuff on and ripped the wifi transmitter out: not hackable