Yes; it eliminates the disagreement between the information from your inner ears and the information from your eyes.
Yes; it eliminates the disturbing information that you are falling and bouncing through the sky.
No; it focuses your attention on the nausea.
No; it intensifies the feeling of falling and bouncing by eliminating the sight of the stable cabin.
Yes; it calms you by allowing the sensory information from your chemoreceptors to properly readjust.