I believe they are stimulating the ganglion cells in the retina. Those are the cells that take signals from photoreceptors and send them to the optic nerve. The primary target for such implants are people with macular degeneration: the photoreceptors slowly die, but the rest of the retina is healthy. This is the leading cause of blindness in the world. Also, you don't necessarily need thousands of electrodes. Even with a single electrode a person can potentially learn to scan the scene to identify objects.

Bio weapons, chemical weapons, genocide, and slavery in those games are obviously a nuisance in comparison to two dudes getting it on.

LAN requires more vespene gas.

You will melt faces as a shadow priest in PvP.

They already found water on Mars: http://m.blog.hu/cy/cydonia/image/misc/First_Picture_of_Water_on_Mars.jpg