directly project images onto our retinas for total immersion
I had an idea for that. Basically, you wear a headset that would have special lights on them (you wouldn't see the lights) that would have the screen projected onto the headset's goggles, and the sound would just be headphones attached to said headset. However, projectors have the problem of being additive, so you'd never get truely black values.
I'd prefer to just have implants, honestly.
As for Crysis, looks good, but I somehow doubt it'll play very well. Far Cry was bad enough in that regard.