Wrist games NEED to make a comeback. There should be a wrist form-factor handheld console solely dedicated to these types of games. They don't need to be full-fledged games. Just have them be simple minigames as companions to full console or PC games, something like the Dreamcast VMU or the Japan-only Sony PocketStation and have it interact with a console or PC via Bluetooth, USB, or micro-SD cards.
Just please don't add any botnet features like GPS or cellular communication.