It'd also be fairly hard to convey haptic interaction. More fundamentally, it seems to me like there's no point in showing us something, even if it's achievabl

It'd also be fairly hard to convey haptic interaction. More fundamentally, it seems to me like there's no point in showing us something, even if it's achievable, if we have no frame of reference for understanding it, or believing that it's possible. 'Visions' aren't really visions if we can't imagine it happening. Seeing Avatar didn't make me go "wow...one day", seeing this video does.