And when they opened her tomb, only the fragrant scent of flowers.
Personally, I believe it was important to us that Mary (although free from Original Sin would not normally have) died an earthly death. We are all promised resurrection on the Last Day, when our souls will be re-united with our bodies in their Glorified Form (what ever that may be). Jesus the Christ did this but He is God and of course He can and did do it. Mary, on the other hand, is a created being like us (except with sin). By taking Mary to heaven in a Glorified State (which is completely fitting for the Mother of God) God is showing us what we can also expect as well.
Our Blessed Mother Mary is now Fully alive in heaven interceding on our behalf.