Around 3 to 4 years ago a new technology has been researched and if you goggle it it hasn't moved on much since then. The name is contact lenses with inbuilt screens. Now along with other pieces of technology such as gps, motion sensors, cameras etc. This could lead to eventually overlaying the virtual reality over what actually exists - yeah I know IRL WoW, I already though of it - so my question is, would you plug in?
EDIT: for your pleasure in reading: http://www.gizmag.com/electronic-contact-lens-promises-bionic-capabilities-for-everyone/8689/