On: Sony announces Project Morpheus, a virtual reality...

[DrStalker]

There's always motion sickness potential. When you move your head there is a delay before the image on the screen updates; make this small enough and you won't notice, make it large enough and the world will appear laggy and unresponsive.

It's definitely less likely to cause sickness than some of the other genres, but not guaranteed safe.

[upwardbound → DrStalker]

> When you move your head there is a delay before the image on the screen updates; make this small enough and you won't notice

Hence why hardware does matter